1.
Majorca
–
Majorca or Mallorca is the largest island in the Balearic Islands archipelago, which are part of Spain and located in the Mediterranean. The capital of the island, Palma, is also the capital of the community of the Balearic Islands. The Balearic Islands have been a region of Spain since 1983. The Cabrera Archipelago is administratively grouped with Majorca, the anthem of Majorca is La Balanguera. Like the other Balearic Islands of Minorca, Ibiza and Formentera, the island is a popular holiday destination, particularly for tourists from Germany. The international airport, Palma de Mallorca Airport, is one of the busiest in Spain, the name derives from Latin insula maior, larger island, later Maiorica, the larger one in comparison to Minorca, the smaller one. Little is recorded of the earliest inhabitants of the island, burial chambers and traces of habitation from the Neolithic period have been discovered, particularly the prehistoric settlements called talaiots, or talayots. They raised Bronze Age megaliths as part of their Talaiotic Culture, the island eventually came under the control of Carthage in North Africa, which had become the principal Phoenician city. After the Second Punic War, Carthage lost all of its overseas possessions, the island was occupied by the Romans in 123 BC under Quintus Caecilius Metellus Balearicus. It flourished under Roman rule, during which time the towns of Pollentia, in addition, the northern town of Bocchoris, dating back to pre-Roman times, was a federated city to Rome. The local economy was driven by olive cultivation, viticulture. Majorcan soldiers were valued within the Roman legions for their skill with the sling, in 427, Gunderic and the Vandals captured the island. Geiseric, son of Gunderic, governed Majorca and used it as his base to loot and plunder settlements around the Mediterranean, in 534, Majorca was recaptured by the Eastern Roman Empire, led by Apollinarius. Under Roman rule, Christianity thrived and numerous churches were built, from 707, the island was increasingly attacked by Muslim raiders from North Africa. Recurrent invasions led the islanders to ask Charlemagne for help, in 902, Issam al-Khawlani conquered the Balearic Islands, ushering in a new period of prosperity under the Emirate of Córdoba. The town of Palma was reshaped and expanded, and became known as Medina Mayurqa, later on, with the Caliphate of Córdoba at its height, the Moors improved agriculture with irrigation and developed local industries. The Caliphate was dismembered in 1015, Majorca came under rule by the Taifa of Dénia, and from 1087 to 1114 was an independent Taifa. During that period the island was visited by Ibn Hazm, however, an expedition of Pisans and Catalans in 1114-15, led by Ramon Berenguer III, Count of Barcelona, overran the island, laying siege to Palma for eight months
Majorca
–
Example of prehistoric talaiot in Majorca
Majorca
–
Flag of Majorca
Majorca
–
Ruins of the Roman city of
Pollentia
Majorca
–
Arab Baths in
Palma
2.
Taxonomy (biology)
–
Taxonomy is the science of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups. The exact definition of taxonomy varies from source to source, but the core of the remains, the conception, naming. There is some disagreement as to whether biological nomenclature is considered a part of taxonomy, the broadest meaning of taxonomy is used here. The word taxonomy was introduced in 1813 by Candolle, in his Théorie élémentaire de la botanique, the term alpha taxonomy is primarily used today to refer to the discipline of finding, describing, and naming taxa, particularly species. In earlier literature, the term had a different meaning, referring to morphological taxonomy, ideals can, it may be said, never be completely realized. They have, however, a value of acting as permanent stimulants. Some of us please ourselves by thinking we are now groping in a beta taxonomy, turrill thus explicitly excludes from alpha taxonomy various areas of study that he includes within taxonomy as a whole, such as ecology, physiology, genetics, and cytology. He further excludes phylogenetic reconstruction from alpha taxonomy, thus, Ernst Mayr in 1968 defined beta taxonomy as the classification of ranks higher than species. This activity is what the term denotes, it is also referred to as beta taxonomy. How species should be defined in a group of organisms gives rise to practical and theoretical problems that are referred to as the species problem. The scientific work of deciding how to define species has been called microtaxonomy, by extension, macrotaxonomy is the study of groups at higher taxonomic ranks, from subgenus and above only, than species. While some descriptions of taxonomic history attempt to date taxonomy to ancient civilizations, earlier works were primarily descriptive, and focused on plants that were useful in agriculture or medicine. There are a number of stages in scientific thinking. Early taxonomy was based on criteria, the so-called artificial systems. Later came systems based on a complete consideration of the characteristics of taxa, referred to as natural systems, such as those of de Jussieu, de Candolle and Bentham. The publication of Charles Darwins Origin of Species led to new ways of thinking about classification based on evolutionary relationships and this was the concept of phyletic systems, from 1883 onwards. This approach was typified by those of Eichler and Engler, the advent of molecular genetics and statistical methodology allowed the creation of the modern era of phylogenetic systems based on cladistics, rather than morphology alone. Taxonomy has been called the worlds oldest profession, and naming and classifying our surroundings has likely been taking place as long as mankind has been able to communicate
Taxonomy (biology)
–
Title page of
Systema Naturae, Leiden, 1735
Taxonomy (biology)
–
Evolution of the
vertebrates at class level, width of spindles indicating number of families. Spindle diagrams are typical for
Evolutionary taxonomy
Taxonomy (biology)
–
The same relationship, expressed as a
cladogram typical for
cladistics
Taxonomy (biology)
–
Type specimen for
Nepenthes smilesii, a tropical
pitcher plant.
3.
Plant
–
Plants are mainly multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. The term is generally limited to the green plants, which form an unranked clade Viridiplantae. This includes the plants, conifers and other gymnosperms, ferns, clubmosses, hornworts, liverworts, mosses and the green algae. Green plants have cell walls containing cellulose and obtain most of their energy from sunlight via photosynthesis by primary chloroplasts and their chloroplasts contain chlorophylls a and b, which gives them their green color. Some plants are parasitic and have lost the ability to produce amounts of chlorophyll or to photosynthesize. Plants are characterized by sexual reproduction and alternation of generations, although reproduction is also common. There are about 300–315 thousand species of plants, of which the great majority, green plants provide most of the worlds molecular oxygen and are the basis of most of Earths ecologies, especially on land. Plants that produce grains, fruits and vegetables form humankinds basic foodstuffs, Plants play many roles in culture. They are used as ornaments and, until recently and in variety, they have served as the source of most medicines. The scientific study of plants is known as botany, a branch of biology, Plants are one of the two groups into which all living things were traditionally divided, the other is animals. The division goes back at least as far as Aristotle, who distinguished between plants, which generally do not move, and animals, which often are mobile to catch their food. Much later, when Linnaeus created the basis of the system of scientific classification. Since then, it has become clear that the plant kingdom as originally defined included several unrelated groups, however, these organisms are still often considered plants, particularly in popular contexts. When the name Plantae or plant is applied to a group of organisms or taxon. The evolutionary history of plants is not yet settled. Those which have been called plants are in bold, the way in which the groups of green algae are combined and named varies considerably between authors. Algae comprise several different groups of organisms which produce energy through photosynthesis, most conspicuous among the algae are the seaweeds, multicellular algae that may roughly resemble land plants, but are classified among the brown, red and green algae. Each of these groups also includes various microscopic and single-celled organisms
Plant
–
Green algae from
Ernst Haeckel 's
Kunstformen der Natur, 1904.
Plant
–
Had'n
Plant
–
Dicksonia antarctica, a species of
tree fern
Plant
–
A petrified log in
Petrified Forest National Park.
4.
Angiosperms
–
The flowering plants, also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants, with 416 families, approx. 13,164 known genera and a total of c.295,383 known species, etymologically, angiosperm means a plant that produces seeds within an enclosure, in other words, a fruiting plant. The term angiosperm comes from the Greek composite word meaning enclosed seeds, the ancestors of flowering plants diverged from gymnosperms in the Triassic Period, during the range 245 to 202 million years ago, and the first flowering plants are known from 160 mya. They diversified extensively during the Lower Cretaceous, became widespread by 120 mya, angiosperms differ from other seed plants in several ways, described in the table. These distinguishing characteristics taken together have made the angiosperms the most diverse and numerous land plants, the amount and complexity of tissue-formation in flowering plants exceeds that of gymnosperms. The vascular bundles of the stem are arranged such that the xylem and phloem form concentric rings, in the dicotyledons, the bundles in the very young stem are arranged in an open ring, separating a central pith from an outer cortex. In each bundle, separating the xylem and phloem, is a layer of meristem or active formative tissue known as cambium, the soft phloem becomes crushed, but the hard wood persists and forms the bulk of the stem and branches of the woody perennial. Among the monocotyledons, the bundles are more numerous in the stem and are scattered through the ground tissue. They contain no cambium and once formed the stem increases in diameter only in exceptional cases, the characteristic feature of angiosperms is the flower. Flowers show remarkable variation in form and elaboration, and provide the most trustworthy external characteristics for establishing relationships among angiosperm species, the function of the flower is to ensure fertilization of the ovule and development of fruit containing seeds. The floral apparatus may arise terminally on a shoot or from the axil of a leaf, occasionally, as in violets, a flower arises singly in the axil of an ordinary foliage-leaf. There are two kinds of cells produced by flowers. Microspores, which divide to become pollen grains, are the male cells and are borne in the stamens. The female cells called megaspores, which divide to become the egg cell, are contained in the ovule. The flower may consist only of parts, as in willow. Usually, other structures are present and serve to protect the sporophylls, the individual members of these surrounding structures are known as sepals and petals. The outer series is usually green and leaf-like, and functions to protect the rest of the flower, the inner series is, in general, white or brightly colored, and is more delicate in structure. It functions to attract insect or bird pollinators, attraction is effected by color, scent, and nectar, which may be secreted in some part of the flower
Angiosperms
Angiosperms
–
Bud of a pink
rose
Angiosperms
–
Flowers of
Malus sylvestris (crab apple)
Angiosperms
–
Flowers and leaves of
Oxalis pes-caprae (Bermuda buttercup)
5.
Eudicots
–
The eudicots, Eudicotidae or eudicotyledons are a monophyletic clade of flowering plants that had been called tricolpates or non-magnoliid dicots by previous authors. The close relationships among flowering plants with tricolpate pollen grains was initially seen in studies of shared derived characters. These plants have a trait in their pollen grains of exhibiting three colpi or grooves paralleling the polar axis. Later molecular evidence confirmed the basis for the evolutionary relationships among flowering plants with tricolpate pollen grains. The term means true dicotyledons, as it contains the majority of plants that have been considered dicots and have characteristics of the dicots, the term eudicots has subsequently been widely adopted in botany to refer to one of the two largest clades of angiosperms, monocots being the other. The remaining angiosperms are sometimes referred to as basal angiosperms or paleodicots, the other name for the eudicots is tricolpates, a name which refers to the grooved structure of the pollen. Members of the group have tricolpate pollen, or forms derived from it and these pollens have three or more pores set in furrows called colpi. In contrast, most of the seed plants produce monosulcate pollen. The name tricolpates is preferred by some botanists to avoid confusion with the dicots, numerous familiar plants are eudicots, including many common food plants, trees, and ornamentals. Most leafy trees of midlatitudes also belong to eudicots, with exceptions being magnolias and tulip trees which belong to magnoliids, and Ginkgo biloba. The name eudicots is used in the APG system, of 1998 and it is applied to a clade, a monophyletic group, which includes most of the dicots. The eudicots can be divided into two groups, the basal eudicots and the core eudicots, basal eudicot is an informal name for a paraphyletic group. The core eudicots are a monophyletic group, a 2010 study suggested the core eudicots can be divided into two clades, Gunnerales and a clade called Pentapetalae, comprising all the remaining core eudicots
Eudicots
–
Eudicots Temporal range:
Early Cretaceous - recent
Eudicots
–
Arabis pollen has three colpi.
6.
Rosales
–
Rosales is an order of flowering plants. It is sister to a clade consisting of Fagales and Cucurbitales and it contains about 7700 species, distributed into about 260 genera. Rosales comprise nine families, the family being the rose family. The largest of these families are Rosaceae and Urticaceae, the order Rosales is divided into three clades that have never been assigned a taxonomic rank. The basal clade consists of the family Rosaceae, another clade consists of four families, including Rhamnaceae, the order Rosales is strongly supported as monophyletic in phylogenetic analyses of DNA sequences, such as those carried out by members of the Angiosperm Phylogeny Group. In their APG III system of plant classification, they defined Rosales as consisting of the nine families listed in the box on the right. The relationships of these families were uncertain until 2011, when they were resolved in a phylogenetic study based on two nuclear genes and ten chloroplast genes. In the classification system of Dahlgren the Rosales were in the superorder Rosiflorae, in the obsolete Cronquist system, the order Rosales was many times polyphyletic. It consisted of the family Rosaceae and 23 other families that are now placed in other orders
Rosales
–
Rosales
7.
Rosaceae
–
Rosaceae, the rose family, is a medium-sized family of flowering plants, including 4,828 known species in 91 genera. The name is derived from the type genus Rosa, among the most species-rich genera are Alchemilla, Sorbus, Crataegus, Cotoneaster, Rubus, and Prunus with about 200 species. However, all of these numbers should be seen as estimates – much taxonomic work remains, the Rosaceae family includes herbs, shrubs, and trees. Most species are deciduous, but some are evergreen and they have a worldwide range, but are most diverse in the Northern Hemisphere. Several economically important products come from the Rosaceae, including many edible fruits, almonds, the Rosaceae have a cosmopolitan distribution, but are primarily concentrated in the Northern Hemisphere in regions that are not desert or tropical rainforest. More recently, Chrysobalanoideae has also treated as a family, but also in Rosales. Neuradoideae has been assigned to Malvales, schulze-Menz, in Englers Syllabus edited by Melchior recognized Rosoideae, Dryadoideae, Lyonothamnoideae, Spireoideae, Amygdaloideae, and Maloideae. They were primarily diagnosed by the structure of the fruits, more recent work has identified that not all of these groups were monophyletic. Hutchinson and Kalkmann recognized only tribes, takhtajan delimited 10 subfamilies, Filipenduloideae, Rosoideae, Ruboideae, Potentilloideae, Coleogynoideae, Kerroideae, Amygdaloideae, Spireoideae, Maloideae, Dichotomanthoideae, and 21 tribes. A more modern model comprises three subfamilies, one of which has remained the same. A cladogram of the family is, Three cladistic analyses were done in 1999 by Rodger Evans, one based on the phenotype, one on molecules, and the third combined. The only major difference in the results with the above cladogram is the position of Kerria, while the boundaries of the Rosaceae are not disputed, there is not general agreement as to how many genera it contains. Areas of divergent opinion include the treatment of Potentilla s. l. compounding the problem is that apomixis is common in several genera. This results in an uncertainty in the number of species contained in each of these genera, Rosaceae can be trees, shrubs, or herbaceous plants. The herbs are mostly perennials, but some also exist. The leaves are arranged spirally, but have an opposite arrangement in some species. They can be simple or pinnately compound, compound leaves appear in around 30 genera. The leaf margin is most often serrate, paired stipules are generally present, and are a primitive feature within the family, independently lost in many groups of Amygdaloideae
Rosaceae
–
Rosaceae Temporal range:
Cretaceous -
Holocene [
citation needed]
8.
Prunus
–
Prunus is a genus of trees and shrubs, which includes the plums, cherries, peaches, nectarines, apricots and almonds. Around 430 species are spread throughout the temperate regions of the globe. Many members of the genus are cultivated for fruit and ornament. The fruit from this genus are called the stone fruit. Members of the genus can be deciduous or evergreen, a few species have spiny stems. The leaves are simple, alternate, usually lanceolate, unlobed, the flowers are usually white to pink, sometimes red, with five petals and five sepals. Flowers are borne singly, or in umbels of two to six or sometimes more on racemes, the fruit is a fleshy drupe with a single relatively large, hard-coated seed. Within the rose family Rosaceae, it was placed as a subfamily, the Amygdaloideae, but was sometimes placed in its own family. More recently, it has become apparent that Prunus evolved from within a larger clade now called subfamily Amygdaloideae. In 1737, Carl Linnaeus used four genera to include the species of modern Prunus—Amygdalus, Cerasus, Prunus, since then, the various genera of Linnaeus and others have become subgenera and sections, as it is clearer that all the species are more closely related. Liberty Hyde Bailey says, The numerous forms grade into each other so imperceptibly and inextricably that the genus cannot be broken up into species. A recent DNA study of 48 species concluded that Prunus is monophyletic and is descended from some Eurasian ancestor, historical treatments break the genus into several different genera, but this segregation is not currently widely recognised other than at the subgeneric rank. ITIS recognises just the single genus Prunus, with an open list of species, all of which are shown below, one standard modern treatment of the subgenera derives from the work of Alfred Rehder in 1940. Rehder hypothesized five subgenera, Amygdalus, Prunus, Cerasus, Padus and Laurocerasus, Prunus can be divided into two clades, Amygdalus-Prunus and Cerasus-Laurocerasus-Padus. Yet another study adds Emplectocladus as a subgenus to the former, the genus Prunus includes the almond, apricot, cherry, peach and plum, all of which have cultivars developed for commercial fruit and nut production. The edible part of the almond is the seed, the fruit is a drupe. Many other species are cultivated or used for their seed. A number of species, hybrids, and cultivars are grown as ornamental plants, usually for their profusion of flowers, sometimes for ornamental foliage and shape
Prunus
–
Prunus
Prunus
–
Japanese cherry (Prunus serrulata) in bloom
Prunus
–
Cherries are prone to
gummosis.
Prunus
–
The development sequence of a
nectarine (Prunus persica) over a 7.5 month period, from bud formation in early winter to fruit ripening in midsummer
9.
Binomial nomenclature
–
Such a name is called a binomial name, a binomen, binominal name or a scientific name, more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs, for example, humans belong to the genus Homo and within this genus to the species Homo sapiens. The formal introduction of system of naming species is credited to Carl Linnaeus. But Gaspard Bauhin, in as early as 1623, had introduced in his book Pinax theatri botanici many names of genera that were adopted by Linnaeus. Although the general principles underlying binomial nomenclature are common to these two codes, there are differences, both in the terminology they use and in their precise rules. Similarly, both parts are italicized when a binomial name occurs in normal text, thus the binomial name of the annual phlox is now written as Phlox drummondii. In scientific works, the authority for a name is usually given, at least when it is first mentioned. In zoology Patella vulgata Linnaeus,1758, the original name given by Linnaeus was Fringilla domestica, the parentheses indicate that the species is now considered to belong in a different genus. The ICZN does not require that the name of the person who changed the genus be given, nor the date on which the change was made, in botany Amaranthus retroflexus L. – L. is the standard abbreviation used in botany for Linnaeus. – Linnaeus first named this bluebell species Scilla italica, Rothmaler transferred it to the genus Hyacinthoides, the ICN does not require that the dates of either publication be specified. Prior to the adoption of the binomial system of naming species. Together they formed a system of polynomial nomenclature and these names had two separate functions. First, to designate or label the species, and second, to be a diagnosis or description, such polynomial names may sometimes look like binomials, but are significantly different. For example, Gerards herbal describes various kinds of spiderwort, The first is called Phalangium ramosum, Branched Spiderwort, is aptly termed Phalangium Ephemerum Virginianum, Soon-Fading Spiderwort of Virginia. The Latin phrases are short descriptions, rather than identifying labels, the Bauhins, in particular Caspar Bauhin, took some important steps towards the binomial system, by pruning the Latin descriptions, in many cases to two words. The adoption by biologists of a system of binomial nomenclature is due to Swedish botanist and physician Carl von Linné. It was in his 1753 Species Plantarum that he first began using a one-word trivial name together with a generic name in a system of binomial nomenclature. This trivial name is what is now known as an epithet or specific name
Binomial nomenclature
–
Carl Linnaeus (1707–1778), a Swedish botanist, invented the modern system of binomial nomenclature.
10.
Philip Miller
–
Philip Miller FRS was an English botanist of Scottish descent. Born in Deptford or Greenwich Miller was chief gardener at the Chelsea Physic Garden from 1722 until he was pressured to retire shortly before his death. Miller corresponded with botanists, and obtained plants from all over the world. His knowledge of living plants, for which he was elected a Fellow of the Royal Society, was unsurpassed in breadth in his lifetime and he trained William Aiton, who later became head gardener at Kew, and William Forsyth, after whom Forsythia was named. Through a consortium of sixty subscribers, 1733–66, the contents of Bartrams boxes introduced such American trees as Abies balsamea, Miller was reluctant to use the new binomial nomenclature of Carl Linnaeus, preferring the classifications of Joseph Pitton de Tournefort and John Ray at first. Miller sent the first long-strand cotton seeds, which he had developed and they were first planted on Sea Island, off the coast of Georgia, and hence derived the name of the finest cotton, Sea Island Cotton. The presumed portrait, engraved by C. J, millers two sons worked under him, one, Charles, became the first head of the Cambridge Botanic Garden. Miller, Philip The Gardeners Kalendar - digital facsimile from Linda Hall Library Miller, Philip Figures of the most beautiful, useful, - digital facsimile from Linda Hall Library
Philip Miller
–
Reputed portrait of Philip Miller from the French translation of The Gardener's Dictionary 1787
11.
Synonym (taxonomy)
–
For example, Linnaeus was the first to give a scientific name to the Norway spruce, which he called Pinus abies. This name is no longer in use, it is now a synonym of the current scientific name which is Picea abies, unlike synonyms in other contexts, in taxonomy a synonym is not interchangeable with the name of which it is a synonym. In taxonomy, synonyms are not equals, but have a different status, for any taxon with a particular circumscription, position, and rank, only one scientific name is considered to be the correct one at any given time. A synonym cannot exist in isolation, it is always an alternative to a different scientific name, given that the correct name of a taxon depends on the taxonomic viewpoint used a name that is one taxonomists synonym may be another taxonomists correct name. Synonyms may arise whenever the same taxon is described and named more than once, independently. They may also arise when existing taxa are changed, as when two taxa are joined to one, a species is moved to a different genus. To the general user of scientific names, in such as agriculture, horticulture, ecology, general science. A synonym is a name that was used as the correct scientific name but which has been displaced by another scientific name. Thus Oxford Dictionaries Online defines the term as a name which has the same application as another. In handbooks and general texts, it is useful to have mentioned as such after the current scientific name. Synonyms used in this way may not always meet the strict definitions of the synonym in the formal rules of nomenclature which govern scientific names. Changes of scientific name have two causes, they may be taxonomic or nomenclatural, a name change may be caused by changes in the circumscription, position or rank of a taxon, representing a change in taxonomic, scientific insight. A name change may be due to purely nomenclatural reasons, that is, based on the rules of nomenclature, the earliest such name is called the senior synonym, while the later name is the junior synonym. One basic principle of zoological nomenclature is that the earliest correctly published name, synonyms are important because if the earliest name cannot be used, then the next available junior synonym must be used for the taxon. Objective synonyms refer to taxa with the type and same rank. For example, John Edward Gray published the name Antilocapra anteflexa in 1855 for a species of pronghorn, however, it is now commonly accepted that his specimen was an unusual individual of the species Antilocapra americana published by George Ord in 1815. Ords name thus takes precedence, with Antilocapra anteflexa being a subjective synonym. Objective synonyms are common at the level of genera, because for various reasons two genera may contain the type species, these are objective synonyms
Synonym (taxonomy)
–
The
Latin Caudata and
Greek Urodela both mean "tailed" and have been used as a scientific name at the rank of order for the
salamanders (as opposed to the tail-less
frogs). Thus they are synonyms.
Synonym (taxonomy)
–
The common dandelion
Taraxacum officinale sensu lato is an extremely widespread group of
apomictic lineages, and some scientists apply the "biological species concept" to divide it into many distinct species; other scientists regard all the names for those independent species as synonyms.
12.
Middle East
–
The Middle East is a transcontinental region centered on Western Asia and Egypt. The corresponding adjective is Middle-Eastern and the noun is Middle-Easterner. The term has come into usage as a replacement of the term Near East beginning in the early 20th century. Arabs, Turks, Persians, Kurds, and Azeris constitute the largest ethnic groups in the region by population. Indigenous minorities of the Middle East include Jews, Assyrians and other Arameans, Baloch, Berbers, Copts, Druze, Lurs, Mandaeans, Samaritans, Shabaks, Tats, in the Middle East, there is also a Romani community. European ethnic groups form a diaspora in the region include Albanians, Bosniaks, Circassians, Crimean Tatars, Franco-Levantines. Among other migrant populations are Bengalis as well as other Indians, Chinese, Filipinos, Indonesians, Pakistanis, the history of the Middle East dates back to ancient times, with the importance of the region being recognized for millennia. Most of the countries border the Persian Gulf have vast reserves of crude oil. The term Middle East may have originated in the 1850s in the British India Office, however, it became more widely known when American naval strategist Alfred Thayer Mahan used the term in 1902 to designate the area between Arabia and India. During this time the British and Russian Empires were vying for influence in Central Asia, Mahan realized not only the strategic importance of the region, but also of its center, the Persian Gulf. Mahan first used the term in his article The Persian Gulf and International Relations, published in September 1902 in the National Review, a British journal. The Middle East, if I may adopt a term which I have not seen, will some day need its Malta, as well as its Gibraltar, it does not follow that either will be in the Persian Gulf. The British Navy should have the facility to concentrate in force if occasion arise, about Aden, India, mahans article was reprinted in The Times and followed in October by a 20-article series entitled The Middle Eastern Question, written by Sir Ignatius Valentine Chirol. During this series, Sir Ignatius expanded the definition of Middle East to include regions of Asia which extend to the borders of India or command the approaches to India. After the series ended in 1903, The Times removed quotation marks from subsequent uses of the term, in the late 1930s, the British established the Middle East Command, which was based in Cairo, for its military forces in the region. After that time, the term Middle East gained broader usage in Europe, the description Middle has also led to some confusion over changing definitions. Before the First World War, Near East was used in English to refer to the Balkans and the Ottoman Empire, while Middle East referred to Iran, the Caucasus, Afghanistan, Central Asia, and Turkestan. The first official use of the term Middle East by the United States government was in the 1957 Eisenhower Doctrine, the Associated Press Stylebook says that Near East formerly referred to the farther west countries while Middle East referred to the eastern ones, but that now they are synonymous
Middle East
–
The
Temple Mount in
Jerusalem
Middle East
–
Map of the Middle East (green).
Middle East
–
The
Kaaba, located in
Mecca,
Saudi Arabia
Middle East
–
Islam is the largest religion in the Middle East. Here, Muslim men are
prostrating during prayer in a mosque.
13.
Indian subcontinent
–
Geologically, the Indian subcontinent is related to the land mass that rifted from Gondwana and merged with the Eurasian plate nearly 55 million years ago. Geographically, it is the region in south-central Asia delineated by the Himalayas in the north, the Hindu Kush in the west. Politically, the Indian subcontinent usually includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, sometimes, the term South Asia is used interchangeably with Indian subcontinent. There is no consensus about which countries should be included in each and it is first attested in 1845 to refer to the North and South Americas, before they were regarded as separate continents. Its use to refer to the Indian subcontinent is seen from the twentieth century. It was especially convenient for referring to the region comprising both the British India and the states under British Paramountcy. The term Indian subcontinent also has a geological significance and it was, like the various continents, a part of the supercontinent of Gondwana. A series of tectonic splits caused formation of basins, each drifting in various directions. The geological region called the Greater India once included the Madagascar, Seychelles, Antartica, as a geological term, Indian subcontinent has meant that region formed from the collision of the Indian basin with Eurasia nearly 55 million years ago, towards the end of Paleocene. The Indian subcontinent has been a particularly common in the British Empire. The region, state Mittal and Thursby, has also labelled as India, Greater India. The BBC and some sources refer to the region as the Asian Subcontinent. Some academics refer to it as South Asian Subcontinent, the terms Indian subcontinent and South Asia are sometimes used interchangeably. There is no accepted definition on which countries are a part of South Asia or Indian subcontinent. In dictionary entries, the term subcontinent signifies a large, distinguishable subdivision of a continent, the region experienced high volcanic activity and plate subdivisions, creating Madagascar, Seychelles, Antartica, Austrolasia and the Indian subcontinent basin. The Indian subcontinent drifted northeastwards, colliding with the Eurasian plate nearly 55 million years ago and this geological region largely includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka. The zone where the Eurasian and Indian subcontinent plates meet remains one of the active areas. The English term mainly continues to refer to the Indian subcontinent, physiographically, it is a peninsular region in south-central Asia delineated by the Himalayas in the north, the Hindu Kush in the west, and the Arakanese in the east
Indian subcontinent
–
Indian subcontinent
14.
North Africa
–
North Africa or Northern Africa is the northernmost region of Africa. The United Nationss definition of Northern Africa is, Algeria, Egypt, Libya, Morocco, Sudan, Tunisia, the countries of Algeria, Morocco, Tunisia, and Libya are often collectively referred to as the Maghreb, which is the Arabic word for sunset. Egypt lies to the northeast and encompasses part of West Asia, while Sudan is situated on the edge of the Sahel, Egypt is a transcontinental country because of the Sinai Peninsula, which geographically lies in Western Asia. North Africa also includes a number of Spanish possessions, the Canary Islands and Madeira in the North Atlantic Ocean northwest of the African mainland are included in considerations of the region. From 3500 BC, following the abrupt desertification of the Sahara due to changes in the Earths orbit. The Islamic influence in the area is significant, and North Africa is a major part of the Muslim world. Some researchers have postulated that North Africa rather than East Africa served as the point for the modern humans who first trekked out of the continent in the Out of Africa migration. The Atlas Mountains extend across much of Morocco, northern Algeria and Tunisia, are part of the mountain system that also runs through much of Southern Europe. They recede to the south and east, becoming a steppe landscape before meeting the Sahara desert, the sediments of the Sahara overlie an ancient plateau of crystalline rock, some of which is more than four billion years old. Sheltered valleys in the Atlas Mountains, the Nile Valley and Delta, a wide variety of valuable crops including cereals, rice and cotton, and woods such as cedar and cork, are grown. Typical Mediterranean crops, such as olives, figs, dates and citrus fruits, the Nile Valley is particularly fertile, and most of the population in Egypt and Sudan live close to the river. Elsewhere, irrigation is essential to improve yields on the desert margins. The inhabitants of Saharan Africa are generally divided in a manner corresponding to the principal geographic regions of North Africa, the Maghreb, the Nile valley. The edge of the Sahel, to the south of Egypt has mainly been inhabited by Nubians, Ancient Egyptians record extensive contact in their Western desert with people that appear to have been Berber or proto-Berber, as well as Nubians from the south. They have contributed to the Arabized Berber populations, the official language or one of the official languages in all of the countries in North Africa is Arabic. The people of the Maghreb and the Sahara regions speak Berber languages and several varieties of Arabic, the Arabic and Berber languages are distantly related, both being members of the Afroasiatic language family. The Tuareg Berber languages are more conservative than those of the coastal cities. Over the years, Berbers have been influenced by contact with cultures, Greeks, Phoenicians, Egyptians, Romans, Vandals, Arabs, Europeans
North Africa
–
Market of
Biskra in Algeria, 1899
North Africa
–
Northern Africa (UN subregion)
North Africa
–
The
kasbah of
Aït Benhaddou in Morocco
North Africa
–
The first
Roman emperor native to North Africa was
Septimius Severus, born in Leptis Magna in present-day Libya.
15.
Seed
–
A seed is an embryonic plant enclosed in a protective outer covering. The formation of the seed is part of the process of reproduction in seed plants, Seeds are the product of the ripened ovule, after fertilization by pollen and some growth within the mother plant. The embryo is developed from the zygote and the coat from the integuments of the ovule. Seed plants now dominate biological niches on land, from forests to both in hot and cold climates. The term seed also has a meaning that antedates the above—anything that can be sown, e. g. seed potatoes. In the case of sunflower and corn seeds, what is sown is the seed enclosed in a shell or husk, many structures commonly referred to as seeds are actually dry fruits. Plants producing berries are called baccate, sunflower seeds are sometimes sold commercially while still enclosed within the hard wall of the fruit, which must be split open to reach the seed. Different groups of plants have other modifications, the stone fruits have a hardened fruit layer fused to. Nuts are the one-seeded, hard-shelled fruit of plants with an indehiscent seed. Seeds are produced in several related groups of plants, and their manner of production distinguishes the angiosperms from the gymnosperms, angiosperm seeds are produced in a hard or fleshy structure called a fruit that encloses the seeds, hence the name. Some fruits have layers of hard and fleshy material. In gymnosperms, no special structure develops to enclose the seeds, however, the seeds do become covered by the cone scales as they develop in some species of conifer. Seed production in natural plant populations varies widely from year-to-year in response to weather variables, insects and diseases, over a 20-year period, for example, forests composed of loblolly pine and shortleaf pine produced from 0 to nearly 5 million sound pine seeds per hectare. Over this period, there were six bumper, five poor, and nine good seed crops, right after fertilization, the zygote is mostly inactive, but the primary endosperm divides rapidly to form the endosperm tissue. This tissue becomes the food the young plant will consume until the roots have developed after germination, after fertilization the ovules develop into the seeds. The ovule consists of a number of components, The funicle or seed stalk which attaches the ovule to the placenta and hence ovary or fruit wall, the nucellus, the remnant of the megasporangium and main region of the ovule where the megagametophyte develops. The micropyle, a pore or opening in the apex of the integument of the ovule where the pollen tube usually enters during the process of fertilization. The chalaza, the base of the ovule opposite the micropyle, the shape of the ovules as they develop often affects the final shape of the seeds
Seed
–
Brown
flax seeds
Seed
–
The inside of a
Ginkgo seed, showing a well-developed embryo, nutritive tissue (
megagametophyte), and a bit of the surrounding seed coat
Seed
–
Layers within an endospermic maize seed
Seed
–
A collection of various vegetable and herb seeds
16.
Peach
–
The peach is a deciduous tree native to the region of Northwest China between the Tarim Basin and the north slopes of the Kunlun Shan mountains, where it was first domesticated and cultivated. It bears an edible fruit called a peach or a nectarine. The specific epithet refers to its widespread cultivation in Persia. It belongs to the genus Prunus which includes the cherry, apricot, almond and plum, the peach is classified with the almond in the subgenus Amygdalus, distinguished from the other subgenera by the corrugated seed shell. Peach and nectarines are the species, even though they are regarded commercially as different fruits. The Peoples Republic of China is the worlds largest producer of peaches, Prunus persica grows to 4–10 m tall and 6 in. in diameter. The leaves are lanceolate, 7–16 cm long, 2–3 cm broad, the flowers are produced in early spring before the leaves, they are solitary or paired,2. 5–3 cm diameter, pink, with five petals. The fruit has yellow or whitish flesh, an aroma. The flesh is very delicate and easily bruised in some cultivars, the single, large seed is red-brown, oval shaped, approximately 1. 3–2 cm long, and is surrounded by a wood-like husk. Peaches, along with cherries, plums and apricots, are stone fruits, there are various heirloom varieties, including the Indian peach, which arrives in the latter part of the summer. Cultivated peaches are divided into clingstones and freestones, depending on whether the flesh sticks to the stone or not, Peaches with white flesh typically are very sweet with little acidity, while yellow-fleshed peaches typically have an acidic tang coupled with sweetness, though this also varies greatly. Both colors often have red on their skin. The scientific name persica, along with the word peach itself, the Ancient Romans referred to the peach as malum persicum Persian apple, later becoming French pêche, hence the English peach. The scientific name, Prunus persica, literally means Persian plum, fossil endocarps with characteristics indistinguishable from those of modern peaches have been recovered from late Pliocene deposits in Kunming, dating to 2.6 million years ago. In the absence of evidence that the plants were in other ways identical to the modern peach, until recently, it was believed that the cultivation started circa 2000 BC. Nevertheless, the recent evidence indicates that domestication occurred as early as 6000 BC in Zhejiang Province of China, the oldest archaeological peach stones are from the Kuahuqiao site. Archaeologists point at the Yangzi River valley as the place where the selection for favorable peach varieties likely took place. Peaches were mentioned in Chinese writings as far back as the 10th century BC and were a fruit of kings
Peach
–
Peach Prunus persica
Peach
–
Amygdalus persica
Peach
–
Peach flower, fruit, seed and leaves as illustrated by Otto Wilhelm Thomé (1885).
Peach
–
Chinese silk tapestry of a Taoist immortal holding a peach
17.
Fruit anatomy
–
Fruit anatomy is the internal structure of fruits. Fruits are the mature ovary or ovaries of one or more flowers, in fleshy fruits, the outer layer is the pericarp, which is the tissue that develops from the ovary wall of the flower and surrounds the seeds. But in some seemingly pericarp fruits, the portion is not derived from the ovary. For example, in the fruit of the tree the edible portion is an aril. The outer covering of a seed is tough because the parent plant needs to protect the plant growing, some plants commonly called vegetables, such as cucumbers, tomatoes, and squash, are actually fruits. Fruits are found in three main categories, Simple fruits are formed from a single ovary and may contain one or many seeds. They can be fleshy or dry. Berries and drupes are examples of simple fleshy fruits, pomes are both accessory fruits and simple fruits. Aggregate fruits are formed from a compound flower and contain many ovaries. Multiple fruits are formed from the ovaries of multiple flowers. An example of a fruit is pineapple. In berries and drupes, the forms the edible tissue around the seeds. In other fruits such as Citrus stone fruits only some layers of the pericarp are eaten, in accessory fruits, other tissues develop into the edible portion of the fruit instead, for example the receptacle of the flower in strawberries. In a citrus fruit, the epicarp and mesocarp make up the peel, epicarp is a botanical term for the outermost layer of the pericarp. The epicarp forms the outer skin of the fruit, if there is one. The epicarp is sometimes called the exocarp, or, especially in Citrus, in citrus fruits, the flavedo constitutes the peripheral surface of the pericarp. When ripe, the cells contain carotenoids inside chromoplasts, which, in a previous developmental stage. This hormonally controlled progression in development is responsible for the change of color from green to yellow upon ripening
Fruit anatomy
–
Longitudinal section of a female flower of a
squash plant (courgette), showing the
ovary,
ovules,
pistil, and
petals.
Fruit anatomy
–
A segment of an
orange that has been opened to show the pulp (
juice vesicles) of the endocarp
Fruit anatomy
–
Olive drupe endocarp (left and center) and the seed (right).
18.
Drupe
–
In botany, a drupe is an indehiscent fruit in which an outer fleshy part surrounds a shell of hardened endocarp with a seed inside. These fruits usually develop from a carpel, and mostly from flowers with superior ovaries. Other fleshy fruits may have an enclosure that comes from the seed coat surrounding the seed. The term drupaceous is applied to a fruit which has the structure and texture of a drupe, the boundary between a drupe and a berry is not always clear. Thus some sources describe the fruit of species of the genus Persea, one definition of berry requires the endocarp to be less than 2 mm thick, other fruits with a stony endocarp being drupes. In marginal cases, terms such as drupaceous or drupe-like may be used, the term stone fruit can be a synonym for drupe or, more typically, it can mean just the fruit of the genus Prunus. Freestone refers to a drupe having a stone which can be removed from the flesh with ease, the flesh is not attached to the stone and does not need to be cut to free the stone. Freestone varieties of fruits are preferred for uses that require removal of the stone. Freestone plums are preferred for making homegrown prunes, and freestone sour cherries are preferred for making pies, clingstone refers to a drupe having a stone which cannot easily be removed from the flesh. The flesh is attached strongly to the stone and must be cut to free the stone, clingstone varieties of fruits in the genus Prunus are preferred as table fruit and for jams, because the flesh of clingstone fruits tends to be more tender and juicy throughout. Tryma is a term for such nut-like drupes that are difficult to categorize. Hickory nuts and walnuts in the Juglandaceae family grow within a husk, these fruits are technically drupes or drupaceous nuts. Many drupes, with their sweet, fleshy outer layer, attract the attention of animals as a food, and the plant population benefits from the resulting dispersal of its seeds. The endocarp is sometimes dropped after the part is eaten, but is often swallowed, passing through the digestive tract. This passage through the tract can reduce the thickness of the endocarp. The process is known as scarification, typical drupes include apricots, olives, peaches, plums, cherries, mangoes and amlas. The coconut is also a drupe, but the mesocarp is fibrous or dry, so this type of fruit is classified as a simple dry, unlike other drupes, the coconut seed is unlikely to be dispersed by being swallowed by fauna, due to its large size. It can, however, float extremely long distances across oceans, bramble fruits are aggregates of drupelets
Drupe
–
The development sequence of a typical drupe, a smooth-skinned (
nectarine) type of peach (Prunus persica) over a 7 1 ⁄ 2 -month period, from bud formation in early winter to fruit ripening in midsummer
Drupe
–
Diagram of a typical drupe (
peach), showing both
fruit and
seed
Drupe
–
The
peach is a typical drupe (stone fruit)
Drupe
–
The pit of a
nectarine
19.
Nut (fruit)
–
A nut is a fruit composed of a hard shell and a seed, which is generally edible. In a general context, however, a variety of dried seeds are called nuts. The translation of nut in certain languages frequently requires paraphrases, as the word is ambiguous. Most seeds come from fruits that naturally free themselves from the shell, unlike nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary. The general and original usage of the term is less restrictive, and many nuts, such as almonds, pecans, pistachios, walnuts, common usage of the term often refers to any hard-walled, edible kernel as a nut. A nut in botany is a dry fruit with one seed in which the ovary wall becomes increasingly hard as it matures. Most nuts come from the pistils with inferior ovaries and all are indehiscent, true nuts are produced, for example, by some plant families of the order Fagales. Order Fagales Family Fagaceae Beech Chestnut Oak Stone-oak Tanoak Family Betulaceae Hazel, in botany, this term specifically refers to a pyrena or pyrene, which is a seed covered by a stony layer, such as the kernel of a drupe. Walnuts and hickories have fruits that are difficult to classify and they are considered to be nuts under some definitions, but are also referred to as drupaceous nuts. Tryma is a term for hickory fruits. In common use, a nut is, as the name implies. This most often comes up regarding allergies, where people are allergic specifically to peanuts. A nut in cuisine is a less restrictive category than a nut in botany. Any large, oily kernels found within a shell and used in food are called nuts. Nuts are an important source of nutrients for humans and wildlife. Because nuts generally have an oil content, they are a highly prized food. A large number of seeds are edible by humans and used in cooking, eaten raw, sprouted, or roasted as a food, or pressed for oil that is used in cookery. Nuts are also a significant source of nutrition for wildlife, Nuts used for food, whether true nut or not, are among the most common food allergens
Nut (fruit)
–
Chestnuts are both botanical and culinary nuts.
Nut (fruit)
–
A
walnut, left, and its seed, right, having been removed from its pericarp.
Nut (fruit)
–
Korean Pine seeds — unshelled, and shell, above; shelled, below
Nut (fruit)
–
Raw
mixed nuts, sold as a snack food. This is a "fancy" mix, meaning that it does not include peanuts.
20.
Blanching (cooking)
–
The meaning of blanch is to whiten, but this is not always the purpose of blanching in cooking. Food is blanched to soften it, or to partly or fully cook it, when almonds or pistachios are blanched, the skin of the nut softens and can be easily removed later. Blanching may simply mean boiling in water for a period to remove unpleasant flavours such as tannins. For example, a treatment for African yam bean, is dehulling followed by blanching in water for 40 minutes at 100 °C. It is recommended that protein-rich salads to be eaten cold be prepared by immersing these protein foods in boiling water for 30 seconds followed by fast chilling, in addition celery, which is almost always a component of these salads…should be treated so as to minimize its bacterial content. In the case of French fries, blanching consists of pre-cooking the French fries in oil at a lower temperature prior to finishing them at a higher temperature, the blanching step cooks the interior of the potato, while the second step at the higher temperature crisps the outside. Parboiling How to Blanch Almonds at about. com
Blanching (cooking)
–
The first step in blanching green beans
Blanching (cooking)
–
Freshly blanched pistachios for dessert cookery
Blanching (cooking)
–
Blanched almonds
21.
Embryo
–
An embryo is an early stage of development of a multicellular diploid eukaryotic organism. In general, in organisms that reproduce sexually, an embryo develops from a zygote, the zygote possesses half the DNA of each of its two parents. In plants, animals, and some protists, the zygote will begin to divide by mitosis to produce a multicellular organism, the result of this process is an embryo. First attested in English in the mid-14c, the word embryon derives from Medieval Latin embryo, itself from Greek ἔμβρυον, lit. Young one, which is the neuter of ἔμβρυος, lit, growing in, from ἐν, in and βρύω, swell, be full, the proper Latinized form of the Greek term would be embryum. In animals, the development of the zygote into an embryo proceeds through specific stages of blastula, gastrula. The blastula stage typically features a fluid-filled cavity, the blastocoel, surrounded by a sphere or sheet of cells, in a placental mammal, an ovum is fertilized in a fallopian tube through which it travels into the uterus. An embryo is called a fetus at an advanced stage of development. In humans, this is from the week of gestation. During gastrulation the cells of the blastula undergo coordinated processes of cell division, invasion, in triploblastic organisms, the three germ layers are called endoderm, ectoderm, and mesoderm. The position and arrangement of the layers are highly species-specific, however. For example, in neurogenesis, a subpopulation of cells is set aside to become the brain, spinal cord. Modern developmental biology is extensively probing the molecular basis for every type of organogenesis, including angiogenesis, chondrogenesis, myogenesis, osteogenesis, and many others. In botany, a plant embryo is part of a seed, consisting of precursor tissues for the leaves, stem. Once the embryo begins to germinate — grow out from the seed — it is called a seedling, bryophytes and ferns also produce an embryo, but do not produce seeds. In these plants, the embryo begins its existence attached to the inside of the archegonium on a parental gametophyte from which the egg cell was generated, the structure and development of the rest of the embryo varies by group of plants. Once the embryo has expanded beyond the enclosing archegonium, it is no longer termed an embryo, embryos are used in various fields of research and in techniques of assisted reproductive technology. An egg may be fertilized in vitro and the embryo may be frozen for later use
Embryo
–
A human embryo. This embryo is about 7 weeks old (or from the 9th week of pregnancy).
Embryo
Embryo
–
An embryo 8 weeks after fertilization (i.e. 10 weeks LMP)
Embryo
–
A complete spontaneous abortion at about 6 weeks from
conception, i.e. 8 weeks from
LMP
22.
Deciduous
–
In a more general sense, deciduous means the dropping of a part that is no longer needed or falling away after its purpose is finished. In plants it is the result of natural processes, in botany and horticulture, deciduous plants, including trees, shrubs and herbaceous perennials, are those that lose all of their leaves for part of the year. In some cases leaf loss coincides with winter—namely in temperate or polar climates, in other parts of the world, including tropical, subtropical, and arid regions, plants lose their leaves during the dry season or other seasons, depending on variations in rainfall. The converse of deciduous is coniferous, where foliage is shed on a different schedule from deciduous trees, plants that are intermediate may be called semi-deciduous, they lose old foliage as new growth begins. Other plants are semi-evergreen and lose their leaves before the growing season. Many deciduous plants flower during the period when they are leafless, the absence of leaves improves wind transmission of pollen for wind-pollinated plants and increases the visibility of the flowers to insects in insect-pollinated plants. This strategy is not without risks, as the flowers can be damaged by frost or, in dry season regions, leaf drop or abscission involves complex physiological signals and changes within plants. The process of photosynthesis steadily degrades the supply of chlorophylls in foliage, the brightest leaf colors are produced when days grow short and nights are cool, but remain above freezing. These other pigments include carotenoids that are yellow, brown, anthocyanin pigments produce red and purple colors, though they are not always present in the leaves. Rather, they are produced in the foliage in late summer, parts of the world that have showy displays of bright autumn colors are limited to locations where days become short and nights are cool. In other parts of the world, the leaves of deciduous trees simply fall off without turning the bright colors produced from the accumulation of anthocyanin pigments, the beginnings of leaf drop starts when an abscission layer is formed between the leaf petiole and the stem. This layer is formed in the spring during active new growth of the leaf, the cells are sensitive to a plant hormone called auxin that is produced by the leaf and other parts of the plant. The elongation of cells break the connection between the different cell layers, allowing the leaf to break away from the plant. It also forms a layer that seals the break, so the plant does not lose sap, in the spring, these proteins are used as a nitrogen source during the growth of new leaves or flowers. Plants with deciduous foliage have advantages and disadvantages compared to plants with evergreen foliage, evergreens suffer greater water loss during the winter and they also can experience greater predation pressure, especially when small. Losing leaves in winter may reduce damage from insects, repairing leaves, removing leaves also reduces cavitation which can damage xylem vessels in plants. This then allows deciduous plants to have xylem vessels with larger diameters, the deciduous characteristic has developed repeatedly among woody plants. Trees include maple, many oaks and nothofagus, elm, aspen, Deciduous shrubs include honeysuckle, viburnum, and many others
Deciduous
–
Deciduous forest in autumn
Deciduous
–
Deciduous forest in winter
Deciduous
–
Mixed deciduous forest in spring
Deciduous
–
Like many deciduous plants,
Forsythia flowers during the leafless season
23.
Leaf
–
A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot, Leaves are collectively referred to as foliage, as in autumn foliage. Although leaves can be seen in different shapes, sizes and textures, typically a leaf is a thin, dorsiventrally flattened organ, borne above ground. Most leaves have distinctive upper surface and lower surface that differ in colour, hairiness, broad, flat leaves with complex venation are known as megaphylls and the species that bear them, the majority, as broad-leaved or megaphyllous plants. In others, such as the clubmosses, with different evolutionary origins, some leaves, such as bulb scales are not above ground, and in many aquatic species the leaves are submerged in water. Succulent plants often have thick juicy leaves, but some leaves are without major photosynthetic function and may be dead at maturity, as in some cataphylls, furthermore, several kinds of leaf-like structures found in vascular plants are not totally homologous with them. Examples include flattened plant stems called phylloclades and cladodes, and flattened leaf stems called phyllodes which differ from both in their structure and origin. Many structures of plants, such as the phyllids of mosses and liverworts and even of some foliose lichens. Leaves are the most important organs of most vascular plants and these are then further processed by chemical synthesis into more complex organic molecules such as cellulose, the basic structural material in plant cell walls. The plant must therefore bring these three together in the leaf for photosynthesis to take place. Once sugar has been synthesized, it needs to be transported to areas of growth such as the plant shoots and roots. Vascular plants transport sucrose in a tissue called the phloem. The phloem and xylem are parallel to each other but the transport of materials is usually in opposite directions. Within the leaf these vascular systems branch to form veins which supply as much as the leaf as possible and they are arranged on the plant so as to expose their surfaces to light as efficiently as possible without shading each other, but there are many exceptions and complications. For instance plants adapted to windy conditions may have pendent leaves, such as in many willows, the flat, or laminar, shape also maximises thermal contact with the surrounding air, promoting cooling. Functionally, in addition to photosynthesis the leaf is the site of transpiration and guttation. Many gymnosperms have thin needle-like or scale-like leaves that can be advantageous in cold climates with frequent snow and these are interpreted as reduced from megaphyllous leaves of their Devonian ancestors. For xerophytes the major constraint is not light flux or intensity, some window plants such as Fenestraria species and some Haworthia species such as Haworthia tesselata and Haworthia truncata are examples of xerophytes. and Bulbine mesembryanthemoides
Leaf
–
The leaves of a
beech tree
Leaf
–
Near the ground these
Eucalyptus saplings have juvenile dorsiventral foliage from the previous year, but this season their newly sprouting foliage is isobilateral, like the mature foliage on the adult trees above
Leaf
–
A leaf shed in
autumn.
Leaf
–
Cross-section of a leaf
24.
Petiole (botany)
–
In botany, the petiole is the stalk that attaches the leaf blade to the stem. The petiole is the transition between the stem and the leaf blade, outgrowths appearing on each side of the petiole in some species are called stipules. Leaves lacking a petiole are called sessile or epetiolate, the petiole is a stalk that attaches a leaf to the plant stem. In petiolate leaves, the stalk may be long, as in the leaves of celery and rhubarb, short or completely absent. Subpetiolate leaves are petiolate, or have an extremely short petiole. The broomrape family Orobanchaceae is an example of a family in which the leaves are always sessile, in some other plant groups, such as the speedwell genus Veronica, petiolate and sessile leaves may occur in different species. In the grasses the leaves are apetiolate, but the blade may be narrowed at the junction with the leaf sheath to form a pseudopetiole. In plants with leaves, the leaflets are attached to a continuation of the petiole called the rachis. Each leaflet may be attached to the rachis by a stalk called the petiolule. There may be swollen regions at either end of the known as pulvina that are composed of a flexible tissue that allows leaf movement. Pulvina are common in the bean family Fabaceae and the plant family Marantaceae. A pulvinus on a petiolule is called a pulvinulus, in some plants, the petioles are flattened and widened, to become phyllodes or phyllodia, or cladophylls and the true leaves may be reduced or absent. Thus, the comes to serve the functions of the leaf. Phyllodes are common in the genus Acacia, especially the Australian species, in Acacia koa, the phyllodes are leathery and thick, allowing the tree to survive stressful environments. The petiole allows partially submerged hydrophytes to have leaves floating at different depths, in plants such as rhubarb, celery, artichokes and cardoons the petioles are cultivated as edible crops. The petiole of rhubarb grows directly from the rhizome and produces the leaf at its end, botanically it is categorized as a vegetable and culinarily used as a fruit. Petiole is pronounced /ˈpiːtᵻoʊl/ and comes from Latin petiolus, or peciolus little foot, stem, the regular diminutive pediculus is also used for foot stalk
Petiole (botany)
–
Leaf of dog rose (
Rosa canina), showing the petiole, two leafy
stipules, and five leaflets
Petiole (botany)
–
Harvested rhubarb petioles with leaves attached
Petiole (botany)
–
Acacia koa with phyllode between the branch and the
compound leaves
25.
Flower
–
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in plants that are floral. The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs, Flowers may facilitate outcrossing or allow selfing. Some flowers produce diaspores without fertilization, Flowers contain sporangia and are the site where gametophytes develop. Many flowers have evolved to be attractive to animals, so as to them to be vectors for the transfer of pollen. After fertilization, the ovary of the flower develops into fruit containing seeds, the essential parts of a flower can be considered in two parts, the vegetative part, consisting of petals and associated structures in the perianth, and the reproductive or sexual parts. A stereotypical flower consists of four kinds of structures attached to the tip of a short stalk, each of these kinds of parts is arranged in a whorl on the receptacle. The four main whorls are as follows, Collectively the calyx, corolla, the next whorl toward the apex, composed of units called petals, which are typically thin, soft and colored to attract animals that help the process of pollination. Androecium, the whorl, consisting of units called stamens. Stamens consist of two parts, a called a filament, topped by an anther where pollen is produced by meiosis. Gynoecium, the innermost whorl of a flower, consisting of one or more units called carpels, the carpel or multiple fused carpels form a hollow structure called an ovary, which produces ovules internally. Ovules are megasporangia and they in turn produce megaspores by meiosis which develop into female gametophytes and these give rise to egg cells. The gynoecium of a flower is described using an alternative terminology wherein the structure one sees in the innermost whorl is called a pistil. A pistil may consist of a carpel or a number of carpels fused together. The sticky tip of the pistil, the stigma, is the receptor of pollen, the supportive stalk, the style, becomes the pathway for pollen tubes to grow from pollen grains adhering to the stigma. The relationship to the gynoecium on the receptacle is described as hypogynous, perigynous, although the arrangement described above is considered typical, plant species show a wide variation in floral structure. These modifications have significance in the evolution of flowering plants and are used extensively by botanists to establish relationships among plant species, the four main parts of a flower are generally defined by their positions on the receptacle and not by their function. Many flowers lack some parts or parts may be modified into other functions and/or look like what is typically another part, in some families, like Ranunculaceae, the petals are greatly reduced and in many species the sepals are colorful and petal-like. Other flowers have modified stamens that are petal-like, the flowers of Peonies and Roses are mostly petaloid stamens
Flower
–
A poster with flowers or clusters of flowers produced by twelve species of flowering plants from different families
Flower
–
Main parts of a mature flower (
Ranunculus glaberrimus)
Flower
–
Reproductive parts of Easter Lily (Lilium longiflorum). 1. Stigma, 2. Style, 3. Stamens, 4. Filament, 5. Petal
Flower
–
Left: A normal zygomorphic Streptocarpus flower. Right: An aberrant peloric Streptocarpus flower. Both of these flowers appeared on the Streptocarpus hybrid 'Anderson's Crows' Wings'.
26.
Exocarp
–
Fruit anatomy is the internal structure of fruits. Fruits are the mature ovary or ovaries of one or more flowers, in fleshy fruits, the outer layer is the pericarp, which is the tissue that develops from the ovary wall of the flower and surrounds the seeds. But in some seemingly pericarp fruits, the portion is not derived from the ovary. For example, in the fruit of the tree the edible portion is an aril. The outer covering of a seed is tough because the parent plant needs to protect the plant growing, some plants commonly called vegetables, such as cucumbers, tomatoes, and squash, are actually fruits. Fruits are found in three main categories, Simple fruits are formed from a single ovary and may contain one or many seeds. They can be fleshy or dry. Berries and drupes are examples of simple fleshy fruits, pomes are both accessory fruits and simple fruits. Aggregate fruits are formed from a compound flower and contain many ovaries. Multiple fruits are formed from the ovaries of multiple flowers. An example of a fruit is pineapple. In berries and drupes, the forms the edible tissue around the seeds. In other fruits such as Citrus stone fruits only some layers of the pericarp are eaten, in accessory fruits, other tissues develop into the edible portion of the fruit instead, for example the receptacle of the flower in strawberries. In a citrus fruit, the epicarp and mesocarp make up the peel, epicarp is a botanical term for the outermost layer of the pericarp. The epicarp forms the outer skin of the fruit, if there is one. The epicarp is sometimes called the exocarp, or, especially in Citrus, in citrus fruits, the flavedo constitutes the peripheral surface of the pericarp. When ripe, the cells contain carotenoids inside chromoplasts, which, in a previous developmental stage. This hormonally controlled progression in development is responsible for the change of color from green to yellow upon ripening
Exocarp
–
Longitudinal section of a female flower of a
squash plant (courgette), showing the
ovary,
ovules,
pistil, and
petals.
Exocarp
–
A segment of an
orange that has been opened to show the pulp (
juice vesicles) of the endocarp
Exocarp
–
Olive drupe endocarp (left and center) and the seed (right).
27.
Plum
–
A plum is a fruit of the subgenus Prunus of the genus Prunus. Mature plum fruit may have a waxy coating that gives them a glaucous appearance. This is a wax coating and is known as wax bloom. Dried plum fruits are called dried plums or prunes, although, in American English, prunes are a type of plum. Plums are a group of species. The commercially important plum trees are medium-sized, usually pruned to 5–6 metres height, the tree is of medium hardiness. Without pruning, the trees can reach 12 metres in height and they blossom in different months in different parts of the world, for example, in about January in Taiwan and early April in the United Kingdom. Fruits are usually of medium size, between 1 and 3 inches in diameter, globose to oval, the flesh is firm and juicy. The fruits peel is smooth, with a waxy surface that adheres to the flesh. The plum is a drupe, meaning its fleshy fruit surrounds a single hard seed, Plum has many species, and taxonomists differ on the count. Depending on the taxonomist, between 19 and 40 species of plum exist, from this diversity only two species, the hexaploid European plum and the diploid Japanese plum, are of worldwide commercial significance. The origin of commercially important species is uncertain but may have involved P. cerasifera. Other species of plum variously originated in Europe, Asia and America, the subgenus Prunus is divided into three sections, Sect. It is juicy and can be fresh or used in jam-making or other recipes. Plum juice can be fermented into plum wine, in central England, a cider-like alcoholic beverage known as plum jerkum is made from plums. Dried plums are also sweet and juicy and contain several antioxidants, plums and prunes are known for their laxative effect. This effect has been attributed to compounds present in the fruits, such as dietary fiber, sorbitol. Prunes and prune juice are used to help regulate the functioning of the digestive system
Plum
–
Plum
Plum
Plum
–
Prunus cultivar (mature fruits with natural wax bloom)
Plum
–
Plum flowers
28.
Cherry
–
A cherry is the fruit of many plants of the genus Prunus, and is a fleshy drupe. The cherry fruits of commerce usually are obtained from a number of species such as cultivars of the sweet cherry. The name cherry also refers to the tree, and is sometimes applied to almonds and visually similar flowering trees in the genus Prunus, as in ornamental cherry, cherry blossom. Wild cherry may refer to any of the species growing outside of cultivation. The subgenus is native to the regions of the Northern Hemisphere. Other cherry fruits are members of subgenus Padus, most eating cherries are derived from either Prunus avium, the sweet cherry, or from Prunus cerasus, the sour cherry. The indigenous range of the sweet cherry extends through most of Europe, western Asia, and parts of northern Africa, and the fruit has been consumed throughout its range since prehistoric times. A cultivated cherry is recorded as having brought to Rome by Lucius Licinius Lucullus from northeastern Anatolia, also known as the Pontus region. Cherries were introduced into England at Teynham, near Sittingbourne in Kent, by order of Henry VIII, cherries arrived in North America early in the settlement of Brooklyn, New York when the region was under Dutch sovereignty. Trades people leased or purchased land to plant orchards and produce gardens, behind the house sold by Anthony Jansen from Salee to Barent Dirksen. Both species originate in Europe and western Asia, they do not cross-pollinate, some other species, although having edible fruit, are not grown extensively for consumption, except in northern regions where the two main species will not grow. Irrigation, spraying, labor, and their propensity to damage from rain, nonetheless, demand is high for the fruit. In commercial production, cherries are harvested by using a mechanized shaker, hand picking is also widely used to harvest the fruit to avoid damage to both fruit and trees. Common rootstocks include Mazzard, Mahaleb, Colt, and Gisela Series, sour cherries require no pollenizer, while few sweet varieties are self-fertile. Like most temperate-latitude trees, cherry seeds require exposure to cold to germinate, the pits are planted in the autumn and seedlings emerge in the spring. A cherry tree will take three to four years in the field to produce its first crop of fruit, and seven years to attain full maturity, because of the cold-weather requirement, none of the Prunus genus can grow in tropical climates. Cherries have a growing season and can grow in most temperate latitudes. Cherries blossom in April and the season for the cherry harvest is in the summer
Cherry
–
Prunus avium, sweet cherry, also called wild cherry
Cherry
–
Prunus cerasus
Cherry
–
Ripe cherries of
Tehran in the middle of June.
Cherry
–
Cherries imported from USA in an Australian supermarket
29.
Endocarp
–
Fruit anatomy is the internal structure of fruits. Fruits are the mature ovary or ovaries of one or more flowers, in fleshy fruits, the outer layer is the pericarp, which is the tissue that develops from the ovary wall of the flower and surrounds the seeds. But in some seemingly pericarp fruits, the portion is not derived from the ovary. For example, in the fruit of the tree the edible portion is an aril. The outer covering of a seed is tough because the parent plant needs to protect the plant growing, some plants commonly called vegetables, such as cucumbers, tomatoes, and squash, are actually fruits. Fruits are found in three main categories, Simple fruits are formed from a single ovary and may contain one or many seeds. They can be fleshy or dry. Berries and drupes are examples of simple fleshy fruits, pomes are both accessory fruits and simple fruits. Aggregate fruits are formed from a compound flower and contain many ovaries. Multiple fruits are formed from the ovaries of multiple flowers. An example of a fruit is pineapple. In berries and drupes, the forms the edible tissue around the seeds. In other fruits such as Citrus stone fruits only some layers of the pericarp are eaten, in accessory fruits, other tissues develop into the edible portion of the fruit instead, for example the receptacle of the flower in strawberries. In a citrus fruit, the epicarp and mesocarp make up the peel, epicarp is a botanical term for the outermost layer of the pericarp. The epicarp forms the outer skin of the fruit, if there is one. The epicarp is sometimes called the exocarp, or, especially in Citrus, in citrus fruits, the flavedo constitutes the peripheral surface of the pericarp. When ripe, the cells contain carotenoids inside chromoplasts, which, in a previous developmental stage. This hormonally controlled progression in development is responsible for the change of color from green to yellow upon ripening
Endocarp
–
Longitudinal section of a female flower of a
squash plant (courgette), showing the
ovary,
ovules,
pistil, and
petals.
Endocarp
–
A segment of an
orange that has been opened to show the pulp (
juice vesicles) of the endocarp
Endocarp
–
Olive drupe endocarp (left and center) and the seed (right).
30.
Persian miniature
–
A Persian miniature is a small painting on paper, whether a book illustration or a separate work of art intended to be kept in an album of such works called a muraqqa. The techniques are comparable to the Western and Byzantine traditions of miniatures in illuminated manuscripts. The tradition continued, under some Western influence, after this, the Persian miniature was the dominant influence on other Islamic miniature traditions, principally the Ottoman miniature in Turkey, and the Mughal miniature in the Indian sub-continent. Persian art under Islam had never completely forbidden the human figure and this was partly because the miniature is a private form, kept in a book or album and only shown to those the owner chooses. It was therefore possible to be free than in wall paintings or other works seen by a wider audience. In Islamic art this is referred to as illumination, and manuscripts of the Quran, in later periods miniatures were increasingly created as single works to be included in albums called muraqqa, rather than illustrated books. This allowed non-royal collectors to afford a representative sample of works from different styles, the bright and pure colouring of the Persian miniature is one of its most striking features. Lighting is even, without shadows or chiaroscuro, walls and other surfaces are shown either frontally, or as at an angle of about 45 degrees, often giving the modern viewer the unintended impression that a building is hexagonal in plan. Buildings are often shown in complex views, mixing interior views through windows or cutaways with exterior views of parts of a facade. Costumes and architecture are always those of the time, many figures are often depicted, with those in the main scene normally rendered at the same size, and recession indicated by placing more distant figures higher up in the space. More important figures may be larger than those around them. The dress of figures is shown with great care, although artists understandably often avoid depicting the patterned cloth that many would have worn. Even when a scene in a palace is shown, the viewpoint often appears to be from a point some metres in the air. This is used in all the manuscripts for the court that constitute the most famous Persian manuscripts. The miniatures normally occupy a full page, later spreading across two pages to regain a square or horizontal landscape format. There are often panels of text or captions inside the picture area, the rest of the page is often decorated with dense designs of plants and animals in a muted grisaille, often gold and brown, text pages without miniatures often also have such borders. In later manuscripts, elements of the miniature begin to expand beyond the frame, another later development was the album miniature, conceived as a single picture rather than a book illustration, though such images may be accompanied by short lyric poems. The withdrawal of Shah Tahmasp I from commissioning illustrated books in the 1540s probably encouraged artists to transfer to these works for a wider circle of patrons
Persian miniature
–
Behzad 's Advice of the Ascetic (c. 1500-1550). As in Western
illuminated manuscripts, exquisitely decorated borders were an integral part of the work of art.
Persian miniature
–
Camp scene from late in the classic period, with no frame.
Majnun (at top wearing orange) spies on his beloved Layla (standing in tent doorway)
Persian miniature
–
Saki, album miniature by
Reza Abbasi, 1609
Persian miniature
–
Complex palace scene, 1539-43,
Mir Sayyid Ali
31.
Konibodom
–
Konibodom is a city and jamoat in the Sughd province of northern Tajikistan, in western Fergana Valley. It has a population of 47,100, the Köppen Climate Classification sub-type for Konibodom is BSk or a Tropical and Subtropical Steppe Climate. The average annual temperature is 14°C, the warmest month is July with an average temperature of 27. 4°C and the coolest month is January with an average temperature of -0. 6°C. The average annual precipitation is 465. 5mm and has an average of 68.9 days with precipitation, the wettest month is March with an average of 77. 7mm of precipitation and the driest month is August with an average of 1. 9mm of precipitation
Konibodom
–
Aini District
32.
Fergana Valley
–
The Fergana Valley is a valley in Central Asia spread across eastern Uzbekistan, southern Kyrgyzstan and northern Tajikistan. Divided into three republics of the former Soviet Union, the valley is ethnically diverse and in the early 21st century was the scene of ethnic conflict, the valleys history stretches back over 2300 years, when its population was conquered by Greco-Bactrian invaders from the west. Chinese chroniclers date its towns to more than 2,100 years ago and it was home to Babur, founder of the Mughal Dynasty, tying the region to modern Afghanistan and South Asia. The Russian Empire conquered the valley at the end of the 19th century and its three Soviet republics gained independence in 1991. The area largely remains Muslim, populated by ethnic Uzbek, Tajik, historically there have also been substantial numbers of Russian, Kashgarians, Kipchaks, Bukharan Jews and Romani minorities. Mass cotton cultivation, introduced by the Soviets, remains central to the economy, along with a range of grains, fruits. There is a history of stock breeding, leatherwork, and a growing mining sector, including deposits of coal, iron, sulfur, gypsum, rock-salt, naphtha. The Fergana Valley is a depression in Central Asia, between the mountain systems of the Tien-Shan in the north and the Gissar-Alai in the south. The valley is approximately 300 kilometres long and up to 70 kilometres wide and its position makes it a separate geographic zone. The valley owes its fertility to two rivers, the Naryn and the Kara Darya, which unite in the valley, near Namangan, numerous other tributaries of these rivers exist in the valley including the Sokh River. This expanse of quicksand, covering an area of 1,900 km2, under the influence of south-west winds, some of the sediments are marine carbonates and clays. The faults are upthrusts and overthrusts, anticlines associated with these faults form traps for petroleum and natural gas, which has been discovered in 52 small fields. The climate of this valley is dry and warm, in March the temperature reaches 20 °C, and then rapidly rises to 35 °C in June, July and August. During the five months following April precipitation is rare, but increases in frequency starting in October, snow and frost, down to -20 °C occurs in December and January. The independent and warlike Sogdiana formed a border region insulating the Achaemenid Persians from the nomadic Scythians to the north and it was later ruled by Seleucids before secession of Bactria. After 250 BC, the city remained in contact with the Greco-Bactrian Kingdom centered on Bactria. Several statuettes and representations of Greek soldiers have been north of the Tien Shan, on the doorstep to China. Of the Greco-Bactrians, the Greek historian Strabo too writes that, they extended their empire even as far as the Seres, after 155 BC, the Yuezhi were pushed into Fergana by neighbors from the north and east
Fergana Valley
–
Fergana Valley near the
Kamchik Pass in Uzbekistan
Fergana Valley
–
Fergana Valley on map showing
Sakastan about 100BC
Fergana Valley
–
Probable Greek soldier in the
Sampul tapestry, woollen wall hanging, 3rd-2nd century BC, Sampul,
Urumqi Xinjiang Museum.
Fergana Valley
–
Ancient cities of
Bactria. Fergana, to the top right, formed a periphery to these less powerful cities and states.
33.
16th Century
–
The 16th century begins with the Julian year 1500 and ends with either the Julian or the Gregorian year 1600. It is regarded by historians as the century in which the rise of the West occurred, during the 16th century, Spain and Portugal explored the worlds seas and opened worldwide oceanic trade routes. In Europe, the Protestant Reformation gave a blow to the authority of the papacy. European politics became dominated by conflicts, with the groundwork for the epochal Thirty Years War being laid towards the end of the century. In Italy, Luca Pacioli published the first work ever on accounting, in United Kingdom, the Italian Alberico Gentili wrote the first book on public international law and divided secularism from canon law and Roman Catholic theology. In the Middle East, the Ottoman Empire continued to expand, with the Sultan taking the title of Caliph, China evacuated the coastal areas, because of Japanese piracy. Japan was suffering a civil war at the time. Mughal Emperor Akbar extended the power of the Mughal Empire to cover most of the South Asian sub continent and his rule significantly influenced arts, and culture in the region. These events directly challenged the notion of an immutable universe supported by Ptolemy and Aristotle. Polybius The Histories translated into Italian, English, German and French, medallion rug, variant Star Ushak style, Anatolia, is made. It is now kept at The Saint Louis Art Museum,1500, Charles V, Holy Roman Emperor and King of Spain was born. 1500, Guru Nanak the beginning and spreading of the 5th largest Religion in the World Sikhism,1500, Spanish navigator Vicente Yáñez Pinzón encounters Brazil but is prevented from claiming it by the Treaty of Tordesillas. 1500, Portuguese navigator Pedro Álvares Cabral claims Brazil for Portugal,1500, The Ottoman fleet of Kemal Reis defeats the Venetians at the Second Battle of Lepanto. 1501, Michelangelo returns to his native Florence to begin work on the statue David,1501, Safavid dynasty reunified Iran and ruled over it until 1736. Safavids adopt a Shia branch of Islam,1502, First reported African slaves in The New World 1503, Foundation of the Sultanate of Sennar by Amara Dunqas, in what is modern Sudan 1503, Spain defeats France at the Battle of Cerignola. Considered to be the first battle in history won by gunpowder small arms,1503, Leonardo da Vinci begins painting the Mona Lisa and completes it three years later. 1503, Nostradamus was born on either December 14, or December 21,1504, A period of drought, with famine in all of Spain. 1504, Death of Isabella I of Castile, Joanna of Castille became the Queen,1505, Zhengde Emperor ascended the throne of Ming Dynasty
16th Century
–
This
world map by the Italian
Amerigo Vespucci and Belgian
Gerardus Mercator besides the classical continents
Europe,
Africa and
Asia shows the
Americas as America sive India Nova,
New Guinea and other islands of
Southeast Asia as well as an Arctic continent and a yet undetermined
Terra Australis.
16th Century
–
The
Statue of David, completed by
Michelangelo in 1504, is one of the most renowned works of the
Renaissance
16th Century
–
Mona Lisa, by
Leonardo da Vinci, c. 1503–1506, one of the world's most well-known paintings.
16th Century
–
Portrait of
Amerigo Vespucci as a child, part of the
Madonna della Misericordia by
Domenico Ghirlandaio at the Ognissanti church in
Florence.
34.
Mediterranean climate
–
A Mediterranean climate /ˌmɛdɪtəˈreɪniən/ or dry summer climate, is the climate typical of the lands in the Mediterranean Basin. The Mediterranean climate is characterised by dry summers and mild, moist winters, the Azores High is associated with the Mediterranean climate found in southern Europe and north Africa and the Sahara Desert with France and England both bordering this climate, France especially. The South Atlantic High is similarly associated with the Namib Desert, under the Köppen climate classification, hot dry-summer climates and cool dry-summer climates are often referred to as mediterranean. Under the Köppen climate system, the first letter indicates the climate group, temperate climates or C zones have an average temperature above 0 °C, but below 18 °C, in their coolest months. The second letter indicates the precipitation pattern, Köppen has defined a dry summer month as a month with less than 30 mm of precipitation and with less than one-third that of the wettest winter month. Some, however, use a 40 mm level, the third letter indicates the degree of summer heat, a represents an average temperature in the warmest month above 22 °C, while b indicates the average temperature in the warmest month below 22 °C. Under the Köppen classification, dry-summer climates usually occur on the sides of continents. Under Trewarthas system, at least eight months must have average temperatures of 10 °C or higher, during summer, regions of mediterranean climate are dominated by subtropical high pressure cells, with dry sinking air capping a surface marine layer of varying humidity and making rainfall unlikely. In many Mediterranean climates there is a strong character to daily temperatures in the warm months. The majority of the regions with mediterranean climates have relatively mild winters, however winter and summer temperatures can vary greatly between different regions with a mediterranean climate. Or to consider summer, Athens experiences rather high temperatures in that season, in contrast, San Francisco has cool summers with daily highs around. In North America, areas with Csc climate can be found in the Olympic, Cascade, Klamath and these locations are found at high altitude nearby lower altitude regions characterized by a warm-summer mediterranean climate or hot-summer mediterranean climate. A rare instance of this occurs in the tropics, on Haleakalā Summit in Hawaii. In South America, Csc regions can be found along the Andes in Chile, the town of Balmaceda is one of the few towns confirmed to have this climate. Small areas with a Csc climate can also be found at elevations in Corsica. Mediterranean climate Explanation of Mediterranean Climate
Mediterranean climate
–
Mediterranean climate distribution in the Americas
Mediterranean climate
–
Hot-summer Mediterranean climate (Csa)
35.
Yamuna River
–
It is the longest river in India which does not directly flow to the sea. Most importantly it creates the highly fertile alluvial, Yamuna-Ganges Doab region between itself and the Ganges in the Indo-Gangetic plain, nearly 57 million people depend on the Yamuna waters. With an annual flow of about 10,000 cubic billion metres and usage of 4,400 cbm, just like the Ganges, the Yamuna too is highly venerated in Hinduism and worshipped as goddess Yamuna, throughout its course. One official describes the river as a drain with biochemical oxygen demand values ranging from 14 to 28 mg/l. Yamunotri temple, a dedicated to the goddess, Yamuna is one of the holiest shrines in Hinduism. Also standing close to the temple, on its 13-kilometre trek route, that follows the bank of the river, lies the Markendeya Tirtha. Large terraces formed over a period of time can be seen in the lower course of the river. Kalanag is the highest point of the entire Yamuna basin, other tributaries in the region are the Giri, Rishi Ganga, Kunta, Hanuman Ganga and Bata tributaries, which drain the Upper Catchment Area of the vast Yamuna basin. Thereafter the river descends on to the plains of Doon Valley, the Yamuna also creates natural state borders between the Himachal Pradesh and Uttarakhand states, and further down between the state of Haryana, Delhi and Uttar Pradesh. The plain itself supports one-third of Indias population through its farming, here pilgrims travel by boats to platforms erected mid stream to offer prayers. During the Kumbh Mela, held every 12 years, the ghats around the Sangam are venue of large congregation of people, the cities of Baghpat, Delhi, Noida, Mathura, Agra, Firozabad, Etawah, Kalpi, Hamirpur, Allahabad lie on its banks. At Etawah, it meets it another important tributary, Chambal, followed by a host of tributaries further down, including, Sindh, the Betwa, and Ken. Tons River, Yamunas largest tributary, rises in the 20,720 ft high Bandarpoonch mountain and it meets Yamuna below Kalsi near Dehradun, Uttarakhand. Sasur Khaderi River, known as Sasur Khaderi is a tributary in Fatehpur district, the name Yamuna seems to be derived from the Sanskrit word yama, meaning twin, and it may have been applied to the river because it runs parallel to the Ganges. The Yamuna is mentioned at many places in the Rig Veda, 1700–1100 BC, and also in the later Atharvaveda, and the Brahmanas including Aitareya Brahmana and Shatapatha Brahmana. In Rig Veda, the story of the Yamuna describes her love for her twin, Yama, who in turn asks her to find a suitable match for herself. It is also said that lord shiva was the reason for the colour of the Yamuna river. After the death of Sati Devi, lord shiva couldnt tolerate the sadness around him, and At last when he went to Yamuna river, it became so black as it absorbed all his sorrow
Yamuna River
–
Taj Mahal in
Agra on the banks of Yamuna
Yamuna River
–
Map
Yamuna River
–
Banderpoonch peak, the source of Yamuna, as seen from
Mussoorie
Yamuna River
–
The
Yamunotri temple on the river, dedicated to Goddess Yamuna.
36.
India
–
India, officially the Republic of India, is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and it is bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast. It shares land borders with Pakistan to the west, China, Nepal, and Bhutan to the northeast, in the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. Indias Andaman and Nicobar Islands share a border with Thailand. The Indian subcontinent was home to the urban Indus Valley Civilisation of the 3rd millennium BCE, in the following millennium, the oldest scriptures associated with Hinduism began to be composed. Social stratification, based on caste, emerged in the first millennium BCE, early political consolidations took place under the Maurya and Gupta empires, the later peninsular Middle Kingdoms influenced cultures as far as southeast Asia. In the medieval era, Judaism, Zoroastrianism, Christianity, and Islam arrived, much of the north fell to the Delhi sultanate, the south was united under the Vijayanagara Empire. The economy expanded in the 17th century in the Mughal empire, in the mid-18th century, the subcontinent came under British East India Company rule, and in the mid-19th under British crown rule. A nationalist movement emerged in the late 19th century, which later, under Mahatma Gandhi, was noted for nonviolent resistance, in 2015, the Indian economy was the worlds seventh largest by nominal GDP and third largest by purchasing power parity. Following market-based economic reforms in 1991, India became one of the major economies and is considered a newly industrialised country. However, it continues to face the challenges of poverty, corruption, malnutrition, a nuclear weapons state and regional power, it has the third largest standing army in the world and ranks sixth in military expenditure among nations. India is a constitutional republic governed under a parliamentary system. It is a pluralistic, multilingual and multi-ethnic society and is home to a diversity of wildlife in a variety of protected habitats. The name India is derived from Indus, which originates from the Old Persian word Hindu, the latter term stems from the Sanskrit word Sindhu, which was the historical local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi, which translates as The people of the Indus, the geographical term Bharat, which is recognised by the Constitution of India as an official name for the country, is used by many Indian languages in its variations. Scholars believe it to be named after the Vedic tribe of Bharatas in the second millennium B. C. E and it is also traditionally associated with the rule of the legendary emperor Bharata. Gaṇarājya is the Sanskrit/Hindi term for republic dating back to the ancient times, hindustan is a Persian name for India dating back to the 3rd century B. C. E. It was introduced into India by the Mughals and widely used since then and its meaning varied, referring to a region that encompassed northern India and Pakistan or India in its entirety
India
–
Flag
India
–
The granite
tower of
Brihadeeswarar Temple in
Thanjavur was completed in 1010 CE by
Raja Raja Chola I.
India
–
Writing the will and testament of the Mughal king court in Persian, 1590–1595
37.
Levant
–
The Levant is an approximate historical geographical term referring to a large area in the Eastern Mediterranean. The term Levant entered English in the late 15th century from French and it derives from the Italian Levante, meaning rising, implying the rising of the sun in the east. As such, it is equivalent to the Arabic term Mashriq. Eventually the term was restricted to the Muslim countries of Syria-Palestine, in 1581, England set up the Levant Company to monopolize commerce with the Ottoman Empire. The name Levant States was used to refer to the French mandate over Syria and this is probably the reason why the term Levant has come to be used synonymously with Syria-Palestine. Some scholars misunderstood the term thinking that it derives from the name of Lebanon, today the term is typically used in conjunction with prehistoric or ancient historical references. It does not include Anatolia, the Caucasus Mountains, or any part of the Arabian Peninsula proper, the Sinai Peninsula is sometimes included. The Levant has been described as the crossroads of western Asia, the eastern Mediterranean, and northeast Africa, the populations of the Levant share not only the geographic position, but cuisine, some customs, and a very long history. They are often referred to as Levantines, the term Levant, which appeared in English in 1497, originally meant the East in general or Mediterranean lands east of Italy. It is borrowed from the French levant rising, referring to the rising of the sun in the east, the phrase is ultimately from the Latin word levare, meaning lift, raise. Similar etymologies are found in Greek Ἀνατολή, in Germanic Morgenland, in Italian, in Hungarian Kelet, in Spanish and Catalan Levante and Llevant, most notably, Orient and its Latin source oriens meaning east, is literally rising, deriving from Latin orior rise. The notion of the Levant has undergone a process of historical evolution in usage, meaning. While the term Levantine originally referred to the European residents of the eastern Mediterranean region, it came to refer to regional native. The English Levant Company was founded in 1581 to trade with the Ottoman Empire, at this time, the Far East was known as the Upper Levant. In early 19th-century travel writing, the term sometimes incorporated certain Mediterranean provinces of the Ottoman empire, in 19th-century archaeology, it referred to overlapping cultures in this region during and after prehistoric times, intending to reference the place instead of any one culture. The French mandate of Syria and Lebanon was called the Levant states, today, Levant is the term typically used by archaeologists and historians with reference to the history of the region. Scholars have adopted the term Levant to identify the region due to it being a wider, yet relevant, archaeologists seeking a neutral orientation that is neither biblical nor national have used terms such as Levantine archaeology and archaeology of the Southern Levant. Two academic journals were launched, Journal of Levantine Studies, published by the Van Leer Jerusalem Institute and The Levantine Review
Levant
–
The
Levantine Sea, the eastern portion of the
Mediterranean.
Levant
–
Countries of the Levant in the broad, historic meaning (equivalent to the
eastern Mediterranean)
Levant
–
French medal commemorating the
war in
Cilicia, which was initially part of the
French mandate.
Levant
–
Satellite view of part of the Levant including
Cyprus,
Israel,
Jordan,
Lebanon,
Palestine, and southern
Syria.
38.
Glycoside
–
In chemistry, a glycoside /ˈɡlaɪkəsaɪd/ is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms, many plants store chemicals in the form of inactive glycosides. These can be activated by enzyme hydrolysis, which causes the part to be broken off. Many such plant glycosides are used as medications, in animals and humans, poisons are often bound to sugar molecules as part of their elimination from the body. In formal terms, a glycoside is any molecule in which a group is bonded through its anomeric carbon to another group via a glycosidic bond. Glycosides can be linked by an O-, N-, S-, according to the IUPAC, the name C-glycoside is a misnomer, the preferred term is C-glycosyl compound. The given definition is the one used by IUPAC, which recommends the Haworth projection to correctly assign stereochemical configurations, many authors require in addition that the sugar be bonded to a non-sugar for the molecule to qualify as a glycoside, thus excluding polysaccharides. The sugar group is known as the glycone and the non-sugar group as the aglycone or genin part of the glycoside. The glycone can consist of a sugar group or several sugar groups. The first glycoside ever identified was amygdalin, by the French chemists Pierre Robiquet and Antoine Boutron-Charlard, molecules containing an N-glycosidic bond are known as glycosylamines and are not discussed in this article. Glycosylamines and glycosides are grouped together as glycoconjugates, other glycoconjugates include glycoproteins, glycopeptides, peptidoglycans, glycolipids, much of the chemistry of glycosides is explained in the article on glycosidic bonds. For example, the glycone and aglycone portions can be separated by hydrolysis in the presence of acid. There are also numerous enzymes that can form and break glycosidic bonds, the most important cleavage enzymes are the glycoside hydrolases, and the most important synthetic enzymes in nature are glycosyltransferases. Genetically altered enzymes termed glycosynthases have been developed that can form glycosidic bonds in excellent yield, there are many ways to chemically synthesize glycosidic bonds. Fischer glycosidation refers to the synthesis of glycosides by the reaction of unprotected monosaccharides with alcohols in the presence of an acid catalyst. The Koenigs-Knorr reaction is the condensation of glycosyl halides and alcohols in the presence of salts such as silver carbonate or mercuric oxide. Glycosides can be classified by the glycone, by the type of glycosidic bond, in the body, toxic substances are often bonded to glucuronic acid to increase their water solubility, the resulting glucuronides are then excreted. Depending on whether the glycosidic bond lies below or above the plane of the sugar molecule
Glycoside
–
Salicin, a glycoside related to
aspirin
39.
Jared Diamond
–
Jared Mason Diamond is an American scientist and author best known for his popular science books The Third Chimpanzee, Guns, Germs, and Steel, Collapse, and The World Until Yesterday. Originally trained in physiology, Diamond is known for drawing from a variety of fields, including anthropology, ecology, geography and he is a professor of geography at the University of California, Los Angeles. In 2005, Diamond was ranked ninth on a poll by Prospect, Diamond was born in Boston, Massachusetts, United States. Both of his parents were from East European Jewish families who had emigrated to the United States and his father, Louis Diamond, was a physician, and his mother, Flora Kaplan, a teacher, linguist, and concert pianist. Diamond himself began studying piano at age six, years later he would propose to his wife playing the Brahms Intermezzo in A minor for her. After graduating from Cambridge, Diamond returned to Harvard as a Junior Fellow until 1965, while in his twenties he developed a second, parallel, career in ornithology and ecology, specialising in New Guinea and nearby islands. Later, in his fifties, Diamond developed a career in environmental history and became a professor of geography at UCLA. He also teaches at LUISS Guido Carli in Rome and he won the National Medal of Science in 1999 and Westfield State University granted him an honorary doctorate in 2009. Diamond originally specialized in salt absorption in the gall bladder, because of this academic diversity, Diamond has been described as a polymath. The book traces how humans evolved to be so different from animals, despite sharing over 98% of our DNA with our closest animal relatives. The book also examines the origins of language, art, agriculture, smoking and drug use. It was well received by critics and won the 1992 Rhône-Poulenc Prize for Science Books and his second and best known popular science book, Guns, Germs, and Steel, The Fates of Human Societies, was published in 1997. It asks why Eurasian peoples conquered or displaced Native Americans, Australians, the first part of the book focuses on reasons why only a few species of wild plants and animals proved suitable for domestication. The third part compares the development of production and of human societies among different continents. A television documentary series based on the book was produced by the National Geographic Society in 2005, as in Guns, Germs, and Steel, he argues against explanations for the failure of past societies based primarily on cultural factors, instead focusing on ecology. Among the societies mentioned in the book are the Norse and Inuit of Greenland, the Maya, the Anasazi, the people of Rapa Nui, Japan, Haiti, the Dominican Republic. It was also nominated for the Royal Society Prize for Science Books, in 2008, Diamond published an article in The New Yorker entitled Vengeance Is Ours, describing the role of revenge in tribal warfare in Papua New Guinea. A year later two indigenous people mentioned in the article filed a lawsuit against Diamond and The New Yorker claiming the article defamed them, in 2013, The Observer reported that the lawsuit was withdrawn by mutual consent after the sudden death of their lawyer
Jared Diamond
–
Jared Diamond
40.
Grafting
–
Grafting or graftage is a horticultural technique whereby tissues of plants are joined so as to continue their growth together. The upper part of the plant is called the scion while the lower part is called the rootstock. The success of this requires that the vascular tissue grow together. The technique is most commonly used in propagation of commercially grown plants for the horticultural and agricultural trades. In most cases, one plant is selected for its roots, the other plant is selected for its stems, leaves, flowers, or fruits and is called the scion or cion. The scion contains the genes to be duplicated in future production by the stock/scion plant. In stem grafting, a common grafting method, a shoot of a selected, desired plant cultivar is grafted onto the stock of another type. For successful grafting to take place, the vascular tissues of the stock. Both tissues must be alive until the graft has taken. Successful grafting only requires that a vascular connection take place between the grafted tissues, joints formed by grafting are not as strong as naturally formed joints, so a physical weak point often still occurs at the graft because only the newly formed tissues inosculate with each other. The existing structural tissue of the plant does not fuse. Precocity, The ability to induce fruitfulness without the need for completing the juvenile phase, juvenility is the natural state through which a seedling plant must pass before it can become reproductive. In most fruiting trees, juvenility may last between 5 and 9 years, but in tropical fruits e. g. Mangosteen. Grafting of mature scions onto rootstocks can result in fruiting in as little as two years, dwarfing, To induce dwarfing or cold tolerance or other characteristics to the scion. Most apple trees in modern orchards are grafted on to dwarf or semi-dwarf trees planted at high density and they provide more fruit per unit of land, higher quality fruit, and reduce the danger of accidents by harvest crews working on ladders. Care must be taken when planting dwarf or semi-dwarf trees, if such a tree is planted with the graft below the soil, then the scion portion can also grow roots and the tree will still grow to its standard size. Ease of propagation, Because the scion is difficult to propagate vegetatively by other means, in this case, cuttings of an easily rooted plant are used to provide a rootstock. In some cases, the scion may be easily propagated, hybrid breeding, To speed maturity of hybrids in fruit tree breeding programs
Grafting
–
Cherry tree, consolidated "V" graft
Grafting
–
Tape has been used to bind the rootstock and scion at the graft and tar of the scion from desiccation.
Grafting
–
A grafted tree showing two different color blossoms
Grafting
–
Graft particular to plum Cherry. The scion is the largest in the plant, due to the imperfect union of the two. It can be seen on the enlarged trunk: this accumulation of starch is an indication of imperfection.
41.
Early Bronze Age
–
The Bronze Age is a historical period characterized by the use of bronze, proto-writing, and other early features of urban civilization. The Bronze Age is the principal period of the three-age Stone-Bronze-Iron system, as proposed in modern times by Christian Jürgensen Thomsen. An ancient civilization is defined to be in the Bronze Age either by smelting its own copper and alloying with tin, arsenic, or other metals, or by trading for bronze from production areas elsewhere. Copper-tin ores are rare, as reflected in the fact there were no tin bronzes in Western Asia before trading in bronze began in the third millennium BC. Worldwide, the Bronze Age generally followed the Neolithic period, with the Chalcolithic serving as a transition, although the Iron Age generally followed the Bronze Age, in some areas, the Iron Age intruded directly on the Neolithic. Bronze Age cultures differed in their development of the first writing, according to archaeological evidence, cultures in Mesopotamia and Egypt developed the earliest viable writing systems. The overall period is characterized by use of bronze, though the place and time of the introduction. Human-made tin bronze technology requires set production techniques, tin must be mined and smelted separately, then added to molten copper to make bronze alloy. The Bronze Age was a time of use of metals. The dating of the foil has been disputed, the Bronze Age in the ancient Near East began with the rise of Sumer in the 4th millennium BC. Societies in the region laid the foundations for astronomy and mathematics, the usual tripartite division into an Early, Middle and Late Bronze Age is not used. Instead, a division based on art-historical and historical characteristics is more common. The cities of the Ancient Near East housed several tens of thousands of people, ur in the Middle Bronze Age and Babylon in the Late Bronze Age similarly had large populations. The earliest mention of Babylonia appears on a tablet from the reign of Sargon of Akkad in the 23rd century BC, the Amorite dynasty established the city-state of Babylon in the 19th century BC. Over 100 years later, it took over the other city-states. Babylonia adopted the written Semitic Akkadian language for official use, by that time, the Sumerian language was no longer spoken, but was still in religious use. Elam was an ancient civilization located to the east of Mesopotamia, in the Old Elamite period, Elam consisted of kingdoms on the Iranian plateau, centered in Anshan, and from the mid-2nd millennium BC, it was centered in Susa in the Khuzestan lowlands. Its culture played a role in the Gutian Empire and especially during the Achaemenid dynasty that succeeded it
Early Bronze Age
–
Chalcolithic copper mine in
Timna Valley,
Negev Desert,
Israel.
Early Bronze Age
–
Diffusion of metallurgy in
Europe and
Asia Minor. The darkest areas are the oldest.
Early Bronze Age
–
A
Shang Dynasty two-handled bronze gefuding gui (1600–1046 BC).
Early Bronze Age
–
Spring and Autumn Period pu bronze vessel with interlaced
dragon design (722–481 BC)
42.
Tutankhamun
–
Tutankhamun was an Egyptian pharaoh of the 18th dynasty, during the period of Egyptian history known as the New Kingdom or sometimes the New Empire Period. He has, since his discovery, been referred to as King Tut. His original name, Tutankhaten, means Living Image of Aten, in hieroglyphs, the name Tutankhamun was typically written Amen-tut-ankh, because of a scribal custom that placed a divine name at the beginning of a phrase to show appropriate reverence. The 1922 discovery by Howard Carter and Lord Carnarvon of Tutankhamuns nearly intact tomb received worldwide press coverage and it sparked a renewed public interest in ancient Egypt, for which Tutankhamuns mask, now in the Egyptian Museum, remains the popular symbol. Exhibits of artifacts from his tomb have toured the world, in February 2010, the results of DNA tests confirmed that he was the son of Akhenaten. His mother was Akhenatens sister and wife, whose name is unknown, the mysterious deaths of a few of those who excavated Tutankhamuns tomb has been popularly attributed to the curse of the pharaohs. Tutankhamun was the son of Akhenaten and one of Akhenatens sisters, as a prince, he was known as Tutankhaten. He ascended to the throne in 1333 BC, at the age of nine or ten and his wet nurse was a woman called Maia, known from her tomb at Saqqara. His teacher was most likely Sennedjem, when he became king, he married his half-sister, Ankhesenpaaten, who later changed her name to Ankhesenamun. They had two daughters, both stillborn, computed tomography studies released in 2011 revealed that one daughter died at 5–6 months of pregnancy and the other at 9 months of pregnancy. No evidence was found in either mummy of congenital anomalies or an apparent cause of death, given his age, the king probably had very powerful advisers, presumably including General Horemheb and Grand Vizier Ay. Horemheb records that the king appointed him lord of the land as hereditary prince to maintain law and he also noted his ability to calm the young king when his temper flared. In his third year, under the influence of his advisors. He ended the worship of the god Aten and restored the god Amun to supremacy, the ban on the cult of Amun was lifted and traditional privileges were restored to its priesthood. The capital was moved back to Thebes and the city of Akhetaten abandoned and this is when he changed his name to Tutankhamun, Living image of Amun, reinforcing the restoration of Amun. As part of his restoration, the king initiated building projects, in particular at Karnak in Thebes, many monuments were erected, and an inscription on his tomb door declares the king had spent his life in fashioning the images of the gods. The traditional festivals were now celebrated again, including those related to the Apis Bull, Horemakhet and his restoration stela says, The temples of the gods and goddesses. Their shrines were deserted and overgrown and their sanctuaries were as non-existent and their courts were used as roads
Tutankhamun
–
Mask of
Tutankhamun's mummy, the popular icon for ancient Egypt at
The Egyptian Museum.
Tutankhamun
–
Stripped of all its jewels, the mummy of Tutankhamun remains in the
Valley of the Kings in his
KV62 chamber
Tutankhamun
–
Bust of Tutankhamun found in his tomb, 1922
Tutankhamun
–
Wooden bust of the boy king, found in his tomb
43.
Late Latin
–
Late Latin is the scholarly name for the written Latin of Late Antiquity. The English dictionary definition of Late Latin dates this period from the 3rd to the 6th centuries AD and this somewhat ambiguously defined period fits between Classical Latin and Medieval Latin. Although there is no consensus about exactly when Classical Latin should end, nor exactly when Medieval Latin should begin. Being a written language, Late Latin is not identical with Vulgar Latin, the latter during those centuries served as proto-Romance, a reconstructed ancestor of the Romance languages. Although Late Latin reflects an upsurge of the use of Vulgar Latin vocabulary and constructs, it remains to a large extent classical in overall features, some are more literary and classical, some more inclined to the vernacular. Nor is Late Latin identical to Christian or patristic Latin, the writings of the early Christian fathers. While Christian writings are considered a subset of Late Latin, pagans wrote much Late Latin, serving as some sort of lingua franca to a large empire, Latin tended to become simpler, to keep above all what it had of the ordinary. Neither Late Latin nor Late Antiquity are modern terms or concepts, instances of English vernacular use of the term may also be found from the 18th century. The term Late Antiquity meaning post-classical and pre-medieval had currency in English well before then, Imperial Latin went on into English literature, Fowlers History of Roman Literature mentions it in 1903. There are, however, insoluble problems with the beginning and end of Imperial Latin, politically the excluded Augustan Period is the paradigm of imperiality, and yet the style cannot be bundled with either the Silver Age or with Late Latin. Moreover, in 6th century Italy, the Roman Empire no longer existed, subsequently the term Imperial Latin was dropped by historians of Latin literature, although it may be seen in marginal works. The Silver Age was extended a century and the four centuries represent Late Latin. Low Latin is a vague and often pejorative term that might refer to any post-classical Latin from Late Latin through Renaissance Latin depending on the author. Its origins are obscure but the Latin expression media et infima Latinitas sprang into public notice in 1678 in the title of a Glossary by Charles du Fresne, the multi-volume set had many editions and expansions by other authors subsequently. The title varies somewhat, most commonly used was Glossarium Mediae et Infimae Latinitatis and it has been translated by expressions of widely different meanings. The uncertainty is understanding what media, middle, and infima, low, the media is securely connected to Medieval Latin by Canges own terminology expounded in the Praefatio, such as scriptores mediae aetatis, writers of the middle age. Canges Glossary takes words from authors ranging from the Christian period to the Renaissance, in the former case the infimae appears extraneous, it recognizes the corruptio of the corrupta Latinitas Cange said his Glossary covered. The two-period case postulates a second unity of style, infima Latinitas, Cange in the glossarial part of his Glossary identifies some words as being used by purioris Latinitatis scriptores, such as Cicero
Late Latin
–
Augustine of Hippo (354 – 430), Late Latin author
Late Latin
–
The Late-Latin speaking world, 271 AD
Late Latin
–
St.
Gildas, one of a number of Late Latin writers to promulgate an excidium or ruina Britanniae because of moral turpitude.
Late Latin
–
Edward Gibbon, English historian who espoused the concept of a decline of the Roman Empire resulting in its fall.
44.
Arabic
–
Arabic is a Central Semitic language that was first spoken in Iron Age northwestern Arabia and is now the lingua franca of the Arab world. Arabic is also the language of 1.7 billion Muslims. It is one of six languages of the United Nations. The modern written language is derived from the language of the Quran and it is widely taught in schools and universities, and is used to varying degrees in workplaces, government, and the media. The two formal varieties are grouped together as Literary Arabic, which is the language of 26 states. Modern Standard Arabic largely follows the standards of Quranic Arabic. Much of the new vocabulary is used to denote concepts that have arisen in the post-Quranic era, Arabic has influenced many languages around the globe throughout its history. During the Middle Ages, Literary Arabic was a vehicle of culture in Europe, especially in science, mathematics. As a result, many European languages have borrowed many words from it. Many words of Arabic origin are found in ancient languages like Latin. Balkan languages, including Greek, have acquired a significant number of Arabic words through contact with Ottoman Turkish. Arabic has also borrowed words from languages including Greek and Persian in medieval times. Arabic is a Central Semitic language, closely related to the Northwest Semitic languages, the Ancient South Arabian languages, the Semitic languages changed a great deal between Proto-Semitic and the establishment of the Central Semitic languages, particularly in grammar. Innovations of the Central Semitic languages—all maintained in Arabic—include, The conversion of the suffix-conjugated stative formation into a past tense, the conversion of the prefix-conjugated preterite-tense formation into a present tense. The elimination of other prefix-conjugated mood/aspect forms in favor of new moods formed by endings attached to the prefix-conjugation forms, the development of an internal passive. These features are evidence of descent from a hypothetical ancestor. In the southwest, various Central Semitic languages both belonging to and outside of the Ancient South Arabian family were spoken and it is also believed that the ancestors of the Modern South Arabian languages were also spoken in southern Arabia at this time. To the north, in the oases of northern Hijaz, Dadanitic and Taymanitic held some prestige as inscriptional languages, in Najd and parts of western Arabia, a language known to scholars as Thamudic C is attested
Arabic
–
The Galland Manuscript of
One Thousand and One Nights, 14th century
Arabic
–
Arabic is the sole official language
Arabic
–
Bilingual traffic sign in
Qatar.
Arabic
–
Examples of how the Arabic root and form system works.
45.
Triangle
–
A triangle is a polygon with three edges and three vertices. It is one of the shapes in geometry. A triangle with vertices A, B, and C is denoted △ A B C, in Euclidean geometry any three points, when non-collinear, determine a unique triangle and a unique plane. This article is about triangles in Euclidean geometry except where otherwise noted, triangles can be classified according to the lengths of their sides, An equilateral triangle has all sides the same length. An equilateral triangle is also a polygon with all angles measuring 60°. An isosceles triangle has two sides of equal length, some mathematicians define an isosceles triangle to have exactly two equal sides, whereas others define an isosceles triangle as one with at least two equal sides. The latter definition would make all equilateral triangles isosceles triangles, the 45–45–90 right triangle, which appears in the tetrakis square tiling, is isosceles. A scalene triangle has all its sides of different lengths, equivalently, it has all angles of different measure. Hatch marks, also called tick marks, are used in diagrams of triangles, a side can be marked with a pattern of ticks, short line segments in the form of tally marks, two sides have equal lengths if they are both marked with the same pattern. In a triangle, the pattern is no more than 3 ticks. Similarly, patterns of 1,2, or 3 concentric arcs inside the angles are used to indicate equal angles, triangles can also be classified according to their internal angles, measured here in degrees. A right triangle has one of its interior angles measuring 90°, the side opposite to the right angle is the hypotenuse, the longest side of the triangle. The other two sides are called the legs or catheti of the triangle, special right triangles are right triangles with additional properties that make calculations involving them easier. One of the two most famous is the 3–4–5 right triangle, where 32 +42 =52, in this situation,3,4, and 5 are a Pythagorean triple. The other one is a triangle that has 2 angles that each measure 45 degrees. Triangles that do not have an angle measuring 90° are called oblique triangles, a triangle with all interior angles measuring less than 90° is an acute triangle or acute-angled triangle. If c is the length of the longest side, then a2 + b2 > c2, a triangle with one interior angle measuring more than 90° is an obtuse triangle or obtuse-angled triangle. If c is the length of the longest side, then a2 + b2 < c2, a triangle with an interior angle of 180° is degenerate
Triangle
–
The
Flatiron Building in New York is shaped like a
triangular prism
Triangle
–
A triangle
46.
Ellipse
–
In mathematics, an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve. As such, it is a generalization of a circle, which is a type of an ellipse having both focal points at the same location. The shape of an ellipse is represented by its eccentricity, which for an ellipse can be any number from 0 to arbitrarily close to, ellipses are the closed type of conic section, a plane curve resulting from the intersection of a cone by a plane. Ellipses have many similarities with the two forms of conic sections, parabolas and hyperbolas, both of which are open and unbounded. The cross section of a cylinder is an ellipse, unless the section is parallel to the axis of the cylinder and this ratio is called the eccentricity of the ellipse. Ellipses are common in physics, astronomy and engineering, for example, the orbit of each planet in our solar system is approximately an ellipse with the barycenter of the planet–Sun pair at one of the focal points. The same is true for moons orbiting planets and all other systems having two astronomical bodies, the shapes of planets and stars are often well described by ellipsoids. It is also the simplest Lissajous figure formed when the horizontal and vertical motions are sinusoids with the same frequency, a similar effect leads to elliptical polarization of light in optics. The name, ἔλλειψις, was given by Apollonius of Perga in his Conics, in order to omit the special case of a line segment, one presumes 2 a > | F1 F2 |, E =. The midpoint C of the segment joining the foci is called the center of the ellipse. The line through the foci is called the major axis and it contains the vertices V1, V2, which have distance a to the center. The distance c of the foci to the center is called the distance or linear eccentricity. The quotient c a is the eccentricity e, the case F1 = F2 yields a circle and is included. C2 is called the circle of the ellipse. This property should not be confused with the definition of an ellipse with help of a directrix below, for an arbitrary point the distance to the focus is 2 + y 2 and to the second focus 2 + y 2. Hence the point is on the ellipse if the condition is fulfilled 2 + y 2 +2 + y 2 =2 a. The shape parameters a, b are called the major axis. The points V3 =, V4 = are the co-vertices and it follows from the equation that the ellipse is symmetric with respect to both of the coordinate axes and hence symmetric with respect to the origin
Ellipse
–
Drawing an ellipse with two pins, a loop, and a pen
Ellipse
–
An ellipse obtained as the intersection of a
cone with an inclined plane.
47.
Neuroanatomy
–
Neuroanatomy is the study of the anatomy and stereotyped organization of nervous systems. In contrast to animals with radial symmetry, whose nervous system consists of a network of cells, animals with bilateral symmetry have segregated, defined nervous systems. Their neuroanatomy is therefore better understood, in vertebrates, the nervous system is segregated into the internal structure of the brain and spinal cord and the routes of the nerves that connect to the rest of the body. The delineation of distinct structures and regions of the system has been critical in investigating how it works. For example, much of what neuroscientists have learned comes from observing how damage or lesions to specific brain areas affects behavior or other neural functions, for information about the composition of animal nervous systems, see nervous system. For information about the structure of the human nervous system. This article discusses information pertinent to the study of neuroanatomy, the first known written record of a study of the anatomy of the human brain is the ancient Egyptian document the Edwin Smith Papyrus. The next major development in neuroanatomy came from the Greek Alcmaeon, who determined that the brain and not the heart ruled the body, herophilus and Erasistratus of Alexandria were perhaps the most influential Greek neuroscientists with their studies involving dissecting the brains. For several hundred years afterward, with the taboo of dissection. However, Pope Sixtus IV effectively revitalized the study of neuroanatomy by altering the papal policy and this resulted in a boom of research in neuroanatomy by artists and scientists of the Renaissance. In 1664, Thomas Willis, a physician and professor at Oxford University, the subsequent three hundred and fifty some years has produced a great deal of documentation and study of the neural systems. At the tissue level, the system is composed of neurons, glial cells. Both neurons and glial cells come in many types, glial cells maintain homeostasis, produce myelin, and provide support and protection for the brains neurons. Some glial cells can even propagate intercellular calcium waves over distances in response to stimulation. The extracellular matrix also provides support on the level for the brains cells. At the organ level, the system is composed of brain regions. These regions are often modular and serve a role within the general pathways of the nervous system. For example, the hippocampus is critical for forming memories, the nervous system also contains nerves, which are bundles of fibers that originate from the brain and spinal cord, and branch repeatedly to innervate every part of the body
Neuroanatomy
–
J. M. Bourgery 's anatomy of the brain, brainstem, and upper spinal column
Neuroanatomy
–
Neuroanatomy is the study of the anatomy and organisation of the nervous system. Pictured here is a cross-secton showing the
gross anatomy of the
human brain
48.
Pollination
–
Pollination is the process by which pollen is transferred to the female reproductive organs of a plant, thereby enabling fertilization to take place. Like all living organisms, seed plants have a major goal. The reproductive unit is the seed, and pollination is a step in the production of seeds in all spermatophytes. The process is different in angiosperms from what it is in gymnosperms. In angiosperms, after the grain has landed on the stigma. Sperm cells from the pollen grain then move along the tube, enter the egg cell through the micropyle and fertilise it. A successful angiosperm pollen grain containing the gametes is transported to the stigma. Its two gametes travel down the tube to where the containing the female gametes are held within the carpel. One nucleus fuses with the bodies to produce the endosperm tissues. In gymnosperms, the ovule is not contained in a carpel, details of the process vary according to the division of gymnosperms in question. Two main modes of fertilization are found in gymnosperms, the study of pollination brings together many disciplines, such as botany, horticulture, entomology, and ecology. The pollination process as an interaction between flower and pollen vector was first addressed in the 18th century by Christian Konrad Sprengel and it is important in horticulture and agriculture, because fruiting is dependent on fertilization, the result of pollination. The study of pollination by insects is known as anthecology, pollen germination has three stages, hydration, activation and pollen tube emergence. The pollen grain is severely dehydrated so that its mass is reduced enabling it to be easily transported from flower to flower. Germination only takes place after rehydration, ensuring that premature germination does not take place in the anther, hydration allows the plasma membrane of the pollen grain to reform into its normal bilayer organization providing an effective osmotic membrane. Activation involves the development of actin filaments throughout the cytoplasm of the cell, hydration and activation continue as the pollen tube begins to grow. In conifers, the structures are borne on cones. The cones are either pollen cones or ovulate cones, but some species are monoecious, a pollen cone contains hundreds of microsporangia carried on reproductive structures called sporophylls
Pollination
–
Carpenter bee with pollen collected from
Night-blooming cereus
Pollination
–
Tip of a
tulip stamen covered with pollen grains.
Pollination
–
A
hummingbird feeding
Pollination
–
A
European honey bee collects nectar, while pollen collects on its body.
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United States
Spain
Australia
Iran
Morocco
Italy
Turkey
Tunisia
Algeria
China
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. PMID 17246020.
