1.
Genus
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A genus is a taxonomic rank used in the biological classification of living and fossil organisms in biology. In the hierarchy of classification, genus comes above species. In binomial nomenclature, the name forms the first part of the binomial species name for each species within the genus. Felis catus and Felis silvestris are two species within the genus Felis, Felis is a genus within the family Felidae. The composition of a genus is determined by a taxonomist, the standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. Moreover, genera should be composed of units of the same kind as other genera. The term comes from the Latin genus, a noun form cognate with gignere, linnaeus popularized its use in his 1753 Species Plantarum, but the French botanist Joseph Pitton de Tournefort is considered the founder of the modern concept of genera. The scientific name of a genus may be called the name or generic epithet. It plays a role in binomial nomenclature, the system of naming organisms. The rules for the names of organisms are laid down in the Nomenclature Codes. The standard way of scientifically describing species and other lower-ranked taxa is by binomial nomenclature, the generic name forms its first half. For example, the gray wolfs binomial name is Canis lupus, with Canis being the name shared by the wolfs close relatives. The specific name is written in lower-case and may be followed by names in zoology or a variety of infraspecific names in botany. Especially with these names, when the generic name is known from context. Because animals are typically only grouped within subspecies, it is written as a trinomen with a third name. Dog breeds, meanwhile, are not scientifically distinguished, there are several divisions of plant species and therefore their infraspecific names generally include contractions explaining the relation. For example, the genus Hibiscus includes hundreds of other species apart from the Rose of Sharon or common garden hibiscus, Rose of Sharon doesnt have subspecies but has cultivars that carry desired traits, such as the bright white H. syriaca Diana. Hawaiian hibiscus, meanwhile, includes several separate species, since not all botanists agree on the divisions or names between species, it is common to specify the source of the name using author abbreviations
2.
Avena
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Avena is a genus of Eurasian and African plants in the grass family. Collectively known as the oats, they include some species which have been cultivated for thousands of years as a source for humans. They are widespread throughout Europe, Asia and northwest Africa, several species have become naturalized in many parts of the world, and are regarded as invasive weeds where they compete with crop production. All oats have edible seeds, though they are small and hard to harvest in most species, see Oat for a more detailed discussion of the oat as a food source. Avena species, including cultivated oats, are used as food plants by the larvae of some Lepidoptera species, including Rustic Shoulder-knot, for diseases of oats, see List of oat diseases. Cultivated oats One species is of commercial importance as a cereal grain. Four other species are grown as crops of minor or regional importance, avena nuda – the naked oat or hulless oat, which plays much the same role in Europe as does A. abyssinica in Ethiopia. It is sometimes included in A. sativa and was grown in Europe before the latter replaced it. As its nutrient content is better than that of the common oat, A. nuda has increased in significance in recent years. They are known as wild oats or oat-grasses, a specific herbicide must be used. The costs of this herbicide and the length of time it must be used to reduce the weed is significant, apparently, a similar expression was used in Roman Republican times, possibly by Plautus. The origin of the expression is the fact that wild oats, among European cereal grains, oats are hardest to tell apart from their weedy relatives, which look almost alike but yield little grain. The life cycle of A. fatua is nearly synchronous with that of common oat, historically, growers could control the weed only by checking the crop plants one by one and hand-weeding. Consequently, sowing wild oats became a phrase to describe unprofitable activities, List of Poaceae genera Quinion, Michael, World Wide Words, Sow ones wild oats. Zohary, Daniel & Hopf, Maria, Domestication of plants in the Old World
3.
Inflorescence
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An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the part of the shoot of seed plants where flowers are formed. Inflorescence can also be defined as the portion of a plant that bears a cluster of flowers in a specific pattern. The stem holding the whole inflorescence is called a peduncle and the major axis holding the flowers or more branches within the inflorescence is called the rachis, the stalk of each single flower is called a pedicel. A flower that is not part of an inflorescence is called a solitary flower, any flower in an inflorescence may be referred to as a floret, especially when the individual flowers are particularly small and borne in a tight cluster, such as in a pseudanthium. The fruiting stage of an inflorescence is known as an infructescence, inflorescences may be simple or complex. The rachis may be one of several types, including Single, Composite, Umbel and these terms are general representations as plants in nature can have a combination of types. Inflorescences usually have modified shoots foliage different from the part of the plant. Considering the broadest meaning of the term, any leaf associated with an inflorescence is called a bract. A bract is usually located at the node where the stem of the inflorescence forms, joined to the main stem of the plant. They serve a variety of functions which include attracting pollinators and protecting young flowers, according to the presence or absence of bracts and their characteristics we can distinguish, Ebracteate inflorescences, No bracts in the inflorescence. Bracteate inflorescences, The bracts in the inflorescence are very specialised, sometimes reduced to small scales and this use is not technically correct, as, despite their normal appearance, these leaves are considered, in fact, bracts, so that leafy inflorescence is preferable. Leafy-bracted inflorescences, Intermediate between bracteate and leafy inflorescence, if many bracts are present and they are strictly connected to the stem, like in the family Asteraceae, the bracts might collectively be called an involucre. If the inflorescence has a unit of bracts further up the stem. Plant organs can grow according to two different schemes, namely monopodial or racemose and sympodial or cymose, the terminal bud keeps growing and forming lateral flowers. A terminal flower is never formed, the terminal bud forms a terminal flower and then dies out. Other flowers then grow from lateral buds, indeterminate and determinate inflorescences are sometimes referred to as open and closed inflorescences respectively. In an indeterminate inflorescence there is no true terminal flower and the stem usually has a rudimentary end, in many cases the last true flower formed by the terminal bud straightens up, appearing to be a terminal flower
4.
Taxonomy (biology)
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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
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Plantae
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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
6.
Angiosperms
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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
7.
Monocots
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Monocotyledons, commonly referred to as monocots, are flowering plants whose seeds typically contain only one embryonic leaf, or cotyledon. However, molecular research has shown that while the monocots form a monophyletic group or clade. Monocots have almost always recognized as a group, but with various taxonomic ranks. The APG III system of 2009 recognises a clade called monocots, the monocots include about 60,000 species. The largest family in this group by number of species are the orchids, about half as many species belong to the true grasses, which are economically the most important family of monocots. In agriculture the majority of the biomass produced comes from monocots and these include not only major grains, but also forage grasses, sugar cane, and the bamboos. Other economically important monocot crops include various palms, bananas, gingers and their relatives, turmeric and cardamom, asparagus and the onions and garlic family. Additionally most of the bulbs, plants cultivated for their blooms, such as lilies, daffodils, irises, amaryllis, cannas, bluebells. The monocots or monocotyledons have, as the name implies, a single cotyledon, or embryonic leaf, from a diagnostic point of view the number of cotyledons is neither a particularly useful characteristic, nor is it completely reliable. Nevertheless, monocots are sufficiently distinctive that there has rarely been disagreement as to membership of this group, however, morphological features that reliably characterise major clades are rare. Thus monocots are distinguishable from other angiosperms both in terms of their uniformity and diversity, although largely herbaceous, some arboraceous monocots reach great height, length and mass. The latter include agaves, palms, pandans, and bamboos and this creates challenges in water transport that monocots deal with in various ways. Some such as species of Yucca develop anomalous secondary growth, while palm trees, the axis undergoes primary thickening, that progresses from internode to internode, resulting in a typical inverted conical shape of the basal primary axis. The limited conductivity also contributes to limited branching of the stems, despite these limitations a wide variety of adaptive growth forms has resulted from epiphytic orchids and bromeliads to submarine Alismatales and mycotrophic Burmanniaceae and Triuridaceae. Other monocots, particularly Poales have adopted a life form. Leaves The cotyledon, the primordial Angiosperm leaf consists of a proximal leaf base or hypophyll, in moncots the hypophyll tends to be the dominant part in contrast to other angiosperms. Mature monocot leaves are narrow and linear, forming a sheathing around the stem at its base. There is usually only one leaf per node because the leaf base encompasses more than half the circumference, the evolution of this monocot characteristic has been attributed to developmental differences in early zonal differentiation rather than meristem activity
8.
Commelinids
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In plant taxonomy, commelinids is a name used by the APG III system for a clade within the monocots, which in its turn is a clade within the angiosperms. The commelinids are the clade that the APG has informally named within the monocots. The remaining monocots are a paraphyletic unit, also known as the commelinid monocots it forms one of three groupings within the monocots, and the final branch, the other two groups being the alismatid monocots and the lilioid monocots. Members of the clade have cell walls containing UV-fluorescent ferulic acid. The commelinids were first recognized as a group in 1967 by Armen Takhtajan. However, by the release of his 1980 system of classification, the commelinids constitute a well-supported clade within the monocots, and this clade has been recognized in all four APG classification systems. The commelinids of APG II and APG III contain essentially the same plants as the commelinoids of the earlier APG system, in APG IV the family Dasypogonaceae is no longer directly placed under commelinids but instead a family of order Arecales. Media related to Commelinids at Wikimedia Commons
9.
Poales
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The Poales are a large order of flowering plants in the monocotyledons, and includes families of plants such as the grasses, bromeliads, and sedges. Sixteen plant families are recognized by botanists to be part of Poales. The flowers are small, enclosed by bracts, and arranged in inflorescences. The flowers of species are wind pollinated, the seeds usually contain starch. It did not include the Bromeliaceae and Mayaceae, but had the additional families Prioniaceae, Sparganiaceae, the morphology-based Cronquist system did not include an order named Poales, assigning these families to the orders Bromeliales, Cyperales, Hydatellales, Juncales, Restionales and Typhales. The earliest known fossils include pollen and fruits, major lineages within the Poales have been referred to as bromeliad, cyperid, xyrid, graminid, and restiid clades. A phylogenetic analysis resolved most relationships within the order but found support for the monophyly of the cyperid clade. The relationship between Centrolepidaceae and Restoniaceae within the clade remains unclear, the first may actually be embedded in the latter. Within the order, by far the most important family economically is the family of grasses, which includes barley, maize, millet, rice, many Bromeliaceae are used as ornamental plants. Bremer, K. Gondwanan Evolution of the Grass Alliance of Families, judd, W. S. C. S. Campbell, E. A. Kellogg, P. F. Stevens, M. J. Donoghue. Plant Systematics, A Phylogenetic Approach, 2nd edition, linder, H. Peter, Rudall, Paula J. Evolutionary History of the Poales. Annual Review of Ecology, Evolution, and Systematics, flora of the Southeastern United States,48
10.
Poaceae
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Poaceae or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses. Poaceae includes the cereal grasses, bamboos and the grasses of natural grassland and cultivated lawns, Grasses have stems that are hollow except at the nodes and narrow alternate leaves borne in two ranks. The lower part of each leaf encloses the stem, forming a leaf-sheath, with ca 780 genera and around 12,000 species, Poaceae are the fifth-largest plant family, following the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. Grasslands such as savannah and prairie grasses are dominant are estimated to constitute 40. 5% of the land area of the Earth, excluding Greenland. Grasses are also an important part of the vegetation in many habitats, including wetlands, forests. Though commonly called grasses, seagrasses, rushes, and sedges fall outside this family, the rushes and sedges are related to the Poaceae, being members of the order Poales, but the seagrasses are members of order Alismatales. The name Poaceae was given by John Hendley Barnhart in 1895, based on the tribe Poeae described in 1814 by Robert Brown, the term is derived from the Ancient Greek πόα. Grasses include some of the most versatile plant life-forms, a cladogram shows subfamilies and approximate species numbers in brackets, Before 2005, fossil findings indicated that grasses evolved around 55 million years ago. Recent findings of grass-like phytoliths in Cretaceous dinosaur coprolites have pushed this back to 66 million years ago. In 2011, revised dating of the origins of the rice tribe Oryzeae suggested a date as early as 107 to 129 Mya, a multituberculate mammal with grass-eating adaptations seems to suggest that grasses were already around at 120 mya. This separation occurred within the short time span of about 4 million years. Grass leaves are always alternate and distichous, and have parallel veins. Each leaf is differentiated into a lower sheath hugging the stem, the leaf blades of many grasses are hardened with silica phytoliths, which discourage grazing animals, some, such as sword grass, are sharp enough to cut human skin. A membranous appendage or fringe of hairs called the ligule lies at the junction between sheath and blade, preventing water or insects from penetrating into the sheath, flowers of Poaceae are characteristically arranged in spikelets, each having one or more florets. The spikelets are further grouped into panicles or spikes, the part of the spikelet that bears the florets is called the rachilla. A spikelet consists of two bracts at the base, called glumes, followed by one or more florets, a floret consists of the flower surrounded by two bracts, one external—the lemma—and one internal—the palea. The flowers are usually hermaphroditic—maize being an important exception—and anemophilous or wind-pollinated, the perianth is reduced to two scales, called lodicules, that expand and contract to spread the lemma and palea, these are generally interpreted to be modified sepals. This complex structure can be seen in the image on the right, the fruit of grasses is a caryopsis, in which the seed coat is fused to the fruit wall
11.
Binomial nomenclature
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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
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Carl Linnaeus
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Carl Linnaeus, also known after his ennoblement as Carl von Linné, was a Swedish botanist, physician, and zoologist, who formalised the modern system of naming organisms called binomial nomenclature. He is known by the father of modern taxonomy. Many of his writings were in Latin, and his name is rendered in Latin as Carolus Linnæus, Linnaeus was born in the countryside of Småland, in southern Sweden. He received most of his education at Uppsala University. He lived abroad between 1735 and 1738, where he studied and also published a first edition of his Systema Naturae in the Netherlands and he then returned to Sweden, where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on journeys through Sweden to find and classify plants. In the 1750s and 1760s, he continued to collect and classify animals, plants, and minerals, at the time of his death, he was one of the most acclaimed scientists in Europe. The philosopher Jean-Jacques Rousseau sent him the message, Tell him I know no man on earth. The German writer Johann Wolfgang von Goethe wrote, With the exception of Shakespeare and Spinoza, Swedish author August Strindberg wrote, Linnaeus was in reality a poet who happened to become a naturalist. Among other compliments, Linnaeus has been called Princeps botanicorum, The Pliny of the North and he is also considered as one of the founders of modern ecology. In botany, the abbreviation used to indicate Linnaeus as the authority for species names is L. In older publications, sometimes the abbreviation Linn. is found, Linnæus was born in the village of Råshult in Småland, Sweden, on 23 May 1707. He was the first child of Nicolaus Ingemarsson and Christina Brodersonia and his siblings were Anna Maria Linnæa, Sofia Juliana Linnæa, Samuel Linnæus, and Emerentia Linnæa. One of a line of peasants and priests, Nils was an amateur botanist, a Lutheran minister. Christina was the daughter of the rector of Stenbrohult, Samuel Brodersonius, a year after Linnæus birth, his grandfather Samuel Brodersonius died, and his father Nils became the rector of Stenbrohult. The family moved into the rectory from the curates house, even in his early years, Linnæus seemed to have a liking for plants, flowers in particular. Whenever he was upset, he was given a flower, which calmed him. Nils spent much time in his garden and often showed flowers to Linnaeus, soon Linnæus was given his own patch of earth where he could grow plants
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Species
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In biology, a species is the basic unit of biological classification and a taxonomic rank. A species is defined as the largest group of organisms in which two individuals can produce fertile offspring, typically by sexual reproduction. While this definition is often adequate, looked at more closely it is problematic, for example, with hybridisation, in a species complex of hundreds of similar microspecies, or in a ring species, the boundaries between closely related species become unclear. Other ways of defining species include similarity of DNA, morphology, all species are given a two-part name, a binomial. The first part of a binomial is the genus to which the species belongs, the second part is called the specific name or the specific epithet. For example, Boa constrictor is one of four species of the Boa genus, Species were seen from the time of Aristotle until the 18th century as fixed kinds that could be arranged in a hierarchy, the great chain of being. In the 19th century, biologists grasped that species could evolve given sufficient time, Charles Darwins 1859 book The Origin of Species explained how species could arise by natural selection. Genes can sometimes be exchanged between species by horizontal transfer, and species may become extinct for a variety of reasons. In his biology, Aristotle used the term γένος to mean a kind, such as a bird or fish, a kind was distinguished by its attributes, for instance, a bird has feathers, a beak, wings, a hard-shelled egg, and warm blood. A form was distinguished by being shared by all its members, Aristotle believed all kinds and forms to be distinct and unchanging. His approach remained influential until the Renaissance, when observers in the Early Modern period began to develop systems of organization for living things, they placed each kind of animal or plant into a context. Many of these early delineation schemes would now be considered whimsical, animals likewise that differ specifically preserve their distinct species permanently, one species never springs from the seed of another nor vice versa. In the 18th century, the Swedish scientist Carl Linnaeus classified organisms according to shared physical characteristics and he established the idea of a taxonomic hierarchy of classification based upon observable characteristics and intended to reflect natural relationships. At the time, however, it was widely believed that there was no organic connection between species, no matter how similar they appeared. However, whether or not it was supposed to be fixed, by the 19th century, naturalists understood that species could change form over time, and that the history of the planet provided enough time for major changes. Jean-Baptiste Lamarck, in his 1809 Zoological Philosophy, described the transmutation of species, proposing that a species could change over time, in 1859, Charles Darwin and Alfred Russel Wallace provided a compelling account of evolution and the formation of new species. Darwin argued that it was populations that evolved, not individuals and this required a new definition of species. Darwin concluded that species are what appear to be, ideas
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Cereal
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A cereal is any grass cultivated for the edible components of its grain, composed of the endosperm, germ, and bran. Cereal grains are grown in quantities and provide more food energy worldwide than any other type of crop and are therefore staple crops. Edible grains from plant families, such as buckwheat, quinoa. In their natural form, cereals are a source of vitamins, minerals, carbohydrates, fats, oils. When refined by the removal of the bran and germ, the endosperm is mostly carbohydrate. In some developing nations, grain in the form of rice, wheat, millet, in developed nations, cereal consumption is moderate and varied but still substantial. The word cereal is derived from Ceres, the Roman goddess of harvest, agriculture allowed for the support of an increased population, leading to larger societies and eventually the development of cities. It also created the need for organization of political power, as decisions had to be made regarding labor and harvest allocation and access rights to water. Agriculture bred immobility, as populations settled down for long periods of time, early Neolithic villages show evidence of the development of processing grain. The Levant is the ancient home of the ancestors of wheat, barley and peas, there is evidence of the cultivation of figs in the Jordan Valley as long as 11,300 years ago, and cereal production in Syria approximately 9,000 years ago. During the same period, farmers in China began to farm rice and millet, using man-made floods, fiber crops were domesticated as early as food crops, with China domesticating hemp, cotton being developed independently in Africa and South America, and Western Asia domesticating flax. The first cereal grains were domesticated by early primitive humans, about 8,000 years ago, they were domesticated by ancient farming communities in the Fertile Crescent region. Emmer wheat, einkorn wheat, and barley were three of the so-called Neolithic founder crops in the development of agriculture, around the same time, millets and rices were starting to become domesticated in East Asia. Sorghum and millets were also being domesticated in sub-Saharan West Africa, while each individual species has its own peculiarities, the cultivation of all cereal crops is similar. Most are annual plants, consequently one planting yields one harvest, wheat, rye, triticale, oats, barley, and spelt are the cool-season cereals. These are hardy plants grow well in moderate weather and cease to grow in hot weather. The warm-season cereals are tender and prefer hot weather, barley and rye are the hardiest cereals, able to overwinter in the subarctic and Siberia. Many cool-season cereals are grown in the tropics, however, some are only grown in cooler highlands, where it may be possible to grow multiple crops per year
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Pseudocereals
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Pseudocereals are non-grasses that are used in much the same way as cereals. Their seed can be ground into flour and otherwise used as cereals, examples of pseudocereals are amaranth, quinoa, and buckwheat. The following table shows the production of some pseudocereals in 1961,2010,2011,2012. Other grains that are important, but are not included in FAO statistics, include, Amaranth
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Oatmeal
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Oatmeal is made of hulled oat grains – groats – that have either been ground, steel-cut, or rolled. Ground oats are also called white oats, steel-cut oats are known as coarse oatmeal or Irish oatmeal or pinhead oats. Rolled oats can be thick or thin, and may be old-fashioned or quick or instant. The term oatmeal is used in the U. S. Australia. The oat grains are dehusked by impact, then heated and cooled to stabilize the oat groats – the seed inside the husk, the process of heating produces a nutty flavour in the oats. These oat groats may be milled to produce fine, medium or coarse oatmeal, steel-cut oats may be small and contain broken groats from the dehusking process. Rolled oats are steamed and flattened whole oat groats, old-fashioned oats can be thick and take a while to boil to make porridge. Quick-cooking rolled oats are cut into pieces before being steamed and rolled. Instant oatmeal is precooked and dried, often with a sweetener, such as sugar, both types of rolled oats may be eaten uncooked, as in muesli, or may be cooked with water to make porridge. In some countries, rolled oats are eaten raw with milk and sugar, sometimes with raisins added, Porridge is served in many ways. In some Western countries, porridge is served with milk or cream, the term oatmeal sometimes refers to porridge made from the bran or fibrous husk as well as the oat kernel or groat. Rolled oats are used as a key ingredient in granola breakfast cereals. Rolled oats are used as an ingredient in oatmeal cookies, oatcakes, British flapjack bars and baked oatmeal dessert dishes such as Apple Brown Betty. Oats may also be added to foods as an accent, as in the topping on many oat bran breads, daily consumption of a bowl of oatmeal can lower blood cholesterol, because of its beta-glucan content. After it was reported that oats can help lower cholesterol, an oat bran craze swept the U. S. in the late 1980s, the food craze was short-lived and faded by the early 1990s. This is because of the beta-glucan in the oats, Oatmeal porridge also contains more B vitamins and calories than other kinds of porridges. Oatmeal has a history in Scottish culinary tradition because oats are better suited than wheat to the countrys low temperatures. As a result, oats became the grain of Scotland
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Rolled oats
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Rolled oats are traditionally oat groats that have been dehusked and steamed, before being rolled into flat flakes under heavy rollers and stabilized by being lightly toasted. Rolled oats that are sold as porridge oats usually have had the tough bran removed and they have often, but not always, been lightly baked or pressure-cooked or processed in some fashion. Thick-rolled oats are large flakes, and thin-rolled oats are smaller. Rolled oats are most often the main ingredient in granola and muesli, rolled oats can be further processed into coarse powder, which, when cooked, becomes a thick broth. Finer oatmeal powder is used as baby food. The oat, like cereals, has a hard, inedible outer husk that must be removed before the grain can be eaten. After the outer husk has been removed from the still bran-covered oat grains, steel-cut or pinhead oats are oat groats that have been chopped into smaller pieces before any steaming and thus retain bits of the bran layer. Oat groats are a grain that can be used as a breakfast cereal, just like the various forms of oatmeal, rolled oats. Rolled oats are used in granola, muesli, oatcakes and flapjacks, whole oats are an excellent source of thiamine, iron, and dietary fiber. Whole oats are also the source of antioxidant compounds known as avenanthramides. Oat products also contain beta-glucan, which may help people with Type 2 diabetes control their blood glucose level, muesli Oat milk Oat bran Oatcake Oatmeal Porridge
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Livestock
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Livestock are domesticated animals raised in an agricultural setting to produce commodities such as food, fiber, and labor. The term is used to refer solely to those raised for food. In recent years, some organizations have also raised livestock to promote the survival of rare breeds, animal husbandry practices have varied widely across cultures and time periods. Originally, livestock were not confined by fences or enclosures, but these practices have largely shifted to intensive animal farming and these practices increase yield of the various commercial outputs, but have led to increased concerns about animal welfare and environmental impact. Livestock production continues to play an economic and cultural role in numerous rural communities. Livestock as a word was first used between 1650 and 1660, as a merger between the live and stock. Older English sources, such as the King James Version of the Bible, the word cattle is derived from Old North French catel, which meant all kinds of movable personal property, including livestock, which was differentiated from immovable real estate. In later English, sometimes smaller livestock such as chickens and pigs were referred to as small cattle, today, the modern meaning of cattle, without a modifier, usually refers to domesticated bovines, but sometimes livestock refers only to this subgroup. Legal definition United States federal legislation sometimes more narrowly defines the term to make specified agricultural commodities either eligible or ineligible for a program or activity, for example, the Livestock Mandatory Reporting Act of 1999 defines livestock only as cattle, swine, and sheep. Animal-rearing originated during the transition to settled farming communities from hunter-gatherer lifestyles. Animals are domesticated when their breeding and living conditions are controlled by humans, over time, the collective behaviour, lifecycle and physiology of livestock have changed radically. Many modern farm animals are unsuited to life in the wild, dogs were domesticated in East Asia about 15,000 years ago. Goats and sheep were domesticated around 8000 BC in Asia, swine or pigs were domesticated by 7000 BC in the Middle East and China. The earliest evidence of horse domestication dates to around 4000 BC, the term livestock is nebulous and may be defined narrowly or broadly. Broadly, livestock refers to any breed or population of animal kept by humans for a useful and this can mean domestic animals, semidomestic animals, or captive wild animals. Semidomesticated refers to animals which are only lightly domesticated or of disputed status and these populations may also be in the process of domestication. Some people may use the term livestock to refer to only used for red meat. Livestock are used by humans for a variety of purposes, many of which have an economic value, Livestock products include, Meat A useful form of dietary protein and energy, meat is the edible tissue of the animal carcass
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Nutrient
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A nutrient is a component in foods that an organism uses to survive and grow. Macronutrients provide the energy an organisms metabolic system needs to function while micronutrients provide the necessary cofactors for metabolism to be carried out. Both types of nutrients can be acquired from the environment, micronutrients are used to build and repair tissues and to regulate body processes while macronutrients are converted to, and used for, energy. Methods of nutrient intake are different for plants and animals, plants take in nutrients directly from the soil through their roots and from the atmosphere through their leaves. Animals and protists have specialized digestive systems that work to break down macronutrients for energy, organic nutrients consist of carbohydrates, fats, proteins, and vitamins. Inorganic chemical compounds such as minerals, water, and oxygen may also be considered nutrients. A nutrient is considered if it must be obtained from an external source either because the organism cannot synthesize it or because insufficient quantities are produced. Nutrients needed in small amounts are called micronutrients while those needed in large quantities are called macronutrients. The effects of nutrients are dose-dependent, shortages are called deficiencies, macronutrients are defined in several different ways. The chemical elements humans consume in the largest quantities are carbon, hydrogen, nitrogen, oxygen, phosphorus, the classes of chemical compounds humans consume in the largest quantities and which provide bulk energy are carbohydrates, proteins, and fats. Water and atmospheric oxygen also must be consumed in large quantities, calcium, salt, magnesium, and potassium are sometimes added to the list of macronutrients because they are required in large quantities compared to other vitamins and minerals. They are sometimes referred to as the macrominerals, carbohydrates are compounds made up of types of sugars. Carbohydrates are classified by their number of units, monosaccharides, disaccharides, oligosaccharides. Proteins are organic compounds that consist of amino acids joined by peptide bonds, the body cannot manufacture some of the amino acids, the diet must supply them. Proteins, in nutrition, are broken down through digestion by proteases back into free amino acids, fats consist of a glycerin molecule with three fatty acids attached. Fatty acids are unbranched hydrocarbon chains,1 connected by single bonds alone or by double and single bonds. Fats are needed to keep cell membranes functioning properly, to insulate body organs against shock, to body temperature stable. The body does not manufacture certain fatty acids and the diet must supply them, although alcohol provides energy, and can thus be compared to macronutrients, it is not a substance that is essential for normal function
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Cholesterol
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Cholesterol, from the Ancient Greek chole- and stereos followed by the chemical suffix -ol for an alcohol, is an organic molecule. Cholesterol enables animal cells to dispense with a wall, thereby allowing animal cells to change shape rapidly. In addition to its importance for cell structure, cholesterol also serves as a precursor for the biosynthesis of steroid hormones, bile acid. Cholesterol is the principal sterol synthesized by all animals, in vertebrates, hepatic cells typically produce the greatest amounts. It is absent among prokaryotes, although there are exceptions, such as Mycoplasma. François Poulletier de la Salle first identified cholesterol in solid form in gallstones in 1769, however, it was not until 1815 that chemist Michel Eugène Chevreul named the compound cholesterine. Furthermore, it can be absorbed directly from animal-based foods, a human male weighing 68 kg normally synthesizes about 1 gram per day, and his body contains about 35 g, mostly contained within the cell membranes. Typical daily cholesterol dietary intake for a man in the United States is 307 mg, most ingested cholesterol is esterified, and esterified cholesterol is poorly absorbed. The body also compensates for any absorption of cholesterol by reducing cholesterol synthesis. For these reasons, cholesterol in food, seven to ten hours after ingestion, has little and it is also important to recognize, however, that the concentrations measured in the samples of blood plasma vary with the measurement methods used. Cholesterol is recycled in the body, the liver excretes it in a non-esterified form into the digestive tract. Typically, about 50% of the excreted cholesterol is reabsorbed by the small intestine back into the bloodstream, plants make cholesterol in very small amounts. Plants manufacture phytosterols, which can compete with cholesterol for reabsorption in the intestinal tract, when intestinal lining cells absorb phytosterols, in place of cholesterol, they usually excrete the phytosterol molecules back into the GI tract, an important protective mechanism. Cholesterol, given that it composes about 30% of all cell membranes, is required to build. The membrane remains stable and durable without being rigid, allowing cells to change shape. In this structural role, cholesterol also reduces the permeability of the membrane to neutral solutes, hydrogen ions. Within the cell membrane, cholesterol also functions in intracellular transport, cell signaling, cholesterol is essential for the structure and function of invaginated caveolae and clathrin-coated pits, including caveola-dependent and clathrin-dependent endocytosis. The role of cholesterol in endocytosis of these types can be investigated by using methyl beta cyclodextrin to remove cholesterol from the plasma membrane, in multiple layers, cholesterol and phospholipids, both electrical insulators, can facilitate speed of transmission of electrical impulses along nerve tissue
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Avenin
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The oat, sometimes called the common oat, is a species of cereal grain grown for its seed, which is known by the same name. While oats are suitable for consumption as oatmeal and rolled oats. The wild ancestor of Avena sativa and the related minor crop. Genetic evidence shows the forms of A. sterilis grew in the Fertile Crescent of the Near East. Domesticated oats appear relatively late, and far from the Near East, oats, like rye, are usually considered a secondary crop, i. e. derived from a weed of the primary cereal domesticates wheat and barley. As these cereals spread westwards into cooler, wetter areas, this may have favored the oat weed component, oats are best grown in temperate regions. Oats are a plant, and can be planted either in autumn or in the spring. Oats have numerous uses in foods, most commonly, they are rolled or crushed into oatmeal, oatmeal is chiefly eaten as porridge, but may also be used in a variety of baked goods, such as oatcakes, oatmeal cookies and oat bread. Oats are also an ingredient in many cold cereals, in particular muesli, historical attitudes towards oats have varied. Oat bread was first manufactured in Britain, where the first oat bread factory was established in 1899, in Scotland, they were, and still are, held in high esteem, as a mainstay of the national diet. In Scotland, a dish was made by soaking the husks from oats for a week, so the fine, floury part of the meal remained as sediment to be strained off, boiled and eaten. Oats are also used there as a thickener in soups. Oats are also used as feed for horses when extra carbohydrates. The oat hull may be crushed for the horse to easily digest the grain. They may be given alone or as part of a food pellet. Cattle are also fed oats, either whole or ground into a coarse flour using a mill, burr mill. Winter oats may be grown as a groundcover and ploughed under in the spring as a green fertilizer. They also can be used for pasture, they can be grazed a while, then allowed to head out for grain production, Oat straw is prized by cattle and horse producers as bedding, due to its soft, relatively dust-free, and absorbent nature
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Gliadin
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Gliadin is a class of proteins present in wheat and several other cereals within the grass genus Triticum. Gliadins, which are a component of gluten, are essential for giving bread the ability to rise properly during baking, gliadins and glutenins are the two main components of the gluten fraction of the wheat seed. This gluten is found in such as wheat flour. Gluten is split evenly between the gliadins and glutenins, although there are variations found in different sources. Gliadin is the component of gluten, while glutenin is insoluble. There are three types of gliadin, to which the body is intolerant in coeliac disease. Diagnosis of this disease has recently been improving, gliadin can cross the intestinal epithelium. Breast milk of human mothers who eat gluten-containing foods presents high levels of non-degraded gliadin. The α, γ, and ω gliadin types are separated and distinguished based on their amino acid sequences, α-/β-gliadins – soluble in low-percentage alcohols. γ-gliadins – ancestral form of cysteine-rich gliadin with only intrachain disulfide bridges ω-gliadins – soluble in higher percentages, gliadins are prolamins and are separated on the basis of electrophoretic mobility and isoelectric focusing. Gliadins are known for their role, along with glutenin, in the formation of gluten and they are slightly soluble in ethanol and contain only intramolecular disulfide links. They also cause some of the best examples of food-derived pathogenesis, people with gluten-sensitive enteropathy are sensitive to α, β, and γ gliadins. Those with WD urticaria and Bakers asthma are sensitive to ω-gliadins, gliadin can also serve as a useful delivery method for sensitive enzymes – this helps protect them from stomach acids that cause breakdown. For useful description of the see, Triticeae glutens Immunochemistry of gluten Deamidated gliadin is produced by acid or enzymatic treatment of gluten. The enzyme tissue transglutaminase converts some of the abundant glutamines to glutamic acid and this is done because gliadins are soluble in alcohol and cannot be mixed with other foods without changing the foods qualities. Deamidated gliadin is soluble in water, the cellular immunity to deamidated α-/β-gliadin is much greater than α/β-gliadin and can result in symptomatic gluten-sensitive enteropathy. Celiac disease is a chronic, immune-mediated intestinal disorder, in which the body becomes intolerant to gliadin, individuals with celiac disease exhibit a lifelong intolerance of wheat, barley and rye – all of which contain gliadins. Gliadin proteins have the ability to provoke an autoimmune enteropathy caused by an immune response in genetically susceptible individuals
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Wheat
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Wheat is a cereal grain, originally from the Levant region but now cultivated worldwide. In 2016, world production of wheat was 749 million tonnes, making it the second most-produced cereal after maize, since 1960, world production of wheat and other grain crops has tripled and is expected to grow further through the middle of the 21st Century. This grain is grown on land area than any other commercial food. World trade in wheat is greater than for all other crops combined, globally, wheat is the leading source of vegetal protein in human food, having a protein content of about 13%, which is relatively high compared to other major cereals and staple foods. The archaeological record suggests that wheat was first cultivated in the regions of the Fertile Crescent around 9600 BCE. In a small part of the population, gluten – the major part of wheat protein – can trigger coeliac disease, non-coeliac gluten sensitivity, gluten ataxia. Cultivation and repeated harvesting and sowing of the grains of wild grasses led to the creation of domestic strains, in domesticated wheat, grains are larger, and the seeds remain attached to the ear by a toughened rachis during harvesting. In wild strains, a more fragile rachis allows the ear to easily shatter, as the traits that improve wheat as a food source also involve the loss of the plants natural seed dispersal mechanisms, highly domesticated strains of wheat cannot survive in the wild. Cultivation of wheat began to spread beyond the Fertile Crescent after about 8000 BCE, jared Diamond traces the spread of cultivated emmer wheat starting in the Fertile Crescent sometime before 8800 BCE. Archaeological analysis of wild emmer indicates that it was first cultivated in the southern Levant with finds dating back as far as 9600 BCE, Genetic analysis of wild einkorn wheat suggests that it was first grown in the Karacadag Mountains in southeastern Turkey. Dated archeological remains of wheat in settlement sites near this region, including those at Abu Hureyra in Syria. With the anomalous exception of two grains from Iraq ed-Dubb, the earliest carbon-14 date for einkorn wheat remains at Abu Hureyra is 7800 to 7500 years BCE. Remains of harvested emmer from several sites near the Karacadag Range have been dated to between 8600 and 8400 BCE, that is, in the Neolithic period and these remains were dated by Willem van Zeist and his assistant Johanna Bakker-Heeres to 8800 BCE. They also concluded that the settlers of Tell Aswad did not develop this form of emmer themselves, the cultivation of emmer reached Greece, Cyprus and India by 6500 BCE, Egypt shortly after 6000 BCE, and Germany and Spain by 5000 BCE. The early Egyptians were developers of bread and the use of the oven, by 3000 BCE, wheat had reached the British Isles and Scandinavia. A millennium later it reached China, the oldest evidence for hexaploid wheat has been confirmed through DNA analysis of wheat seeds, dating to around 6400-6200 BCE, recovered from Çatalhöyük. The first identifiable bread wheat with sufficient gluten for yeasted breads has been identified using DNA analysis in samples from a dating to approximately 1350 BCE at Assiros in Macedonia. From Asia, wheat continued to spread throughout Europe, in the British Isles, wheat straw was used for roofing in the Bronze Age, and was in common use until the late 19th century
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Gluten
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Gluten is a composite of storage proteins termed prolamins and glutelins found in wheat and related grains, including barley, rye, oat, and all their species and hybrids. Gluten is appreciated for its viscoelastic properties and it gives elasticity to dough, helping it rise and keep its shape and often gives the final product a chewy texture. Gluten is conjoined with starch in the endosperm of various grassrelated grains, Wheat prolamins are called gliadins, barley prolamins are hordeins, rye prolamins are secalins and oats prolamins are avenins, which are collectively named gluten. Oat avenin toxicity in people with gluten-related disorders depends on the oat cultivar consumed because the immunoreactivities of toxic prolamins are different among oat varieties, also, many oat products are cross-contaminated with other gluten-containing cereals. The fruit of most flowering plants have endosperms with stored protein to nourish embryonic plants during germination, true gluten is limited to the grains listed above. The stored proteins of maize and rice are sometimes called glutens, gluten is a protein complex that accounts for 75 to 85% of the total protein in bread wheat. Gluten is prepared from flour by kneading the flour under water, agglomerating the gluten into a network, a dough. Starch granules disperse in water, and the dispersed starch is sedimented and dried. If a saline solution is used instead of water, a protein is obtained. Where starch is the product, cold water is the favored solvent because the impurities depart from the gluten. In home or restaurant cooking, a ball of flour dough is kneaded under water until the starch disperses out. In industrial production, a slurry of wheat flour is kneaded vigorously by machinery until the gluten agglomerates into a mass and this mass is collected by centrifugation, then transported through several stages integrated in a continuous process. The process yields a powder with a 7% moisture content. In the final step, the gluten is sifted and milled to produce a uniform product. Gluten forms when glutenin molecules cross-link to form a network attached to gliadin. If this dough is leavened with yeast, fermentation produces carbon dioxide bubbles, baking coagulates the gluten, which, along with starch, stabilizes the shape of the final product. Gluten content has been implicated as a factor in the staling of bread, the development of gluten affects the texture of the baked goods. More refining leads to products such as pizza and bagels
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Polyploidy
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Polyploid cells and organisms are those containing more than two paired sets of chromosomes. Most species whose cells have nuclei are diploid, meaning they have two sets of chromosomes—one set inherited from each parent, however, polyploidy is found in some organisms and is especially common in plants. In addition, polyploidy occurs in tissues of animals that are otherwise diploid. Species whose cells do not have nuclei, that is, Prokaryotes, may be polyploid organisms, hence ploidy is defined with respect to a cell. Most eukaryotes have diploid somatic cells, but produce haploid gametes by meiosis, a monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Male bees and other Hymenoptera, for example, are monoploid, unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, polyploidy refers to a numerical change in a whole set of chromosomes. Organisms in which a particular chromosome, or chromosome segment, is under- or overrepresented are said to be aneuploid, polyploidy may occur due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis. Polyploidy occurs in highly differentiated human tissues in the liver, heart muscle and it occurs in the somatic cells of some animals, such as goldfish, salmon, and salamanders, but is especially common among ferns and flowering plants, including both wild and cultivated species. Many agriculturally important plants of the genus Brassica are also tetraploids, oryzalin will also double the existing chromosome content. Polyploid types are labeled according to the number of sets in the nucleus. The letter x is used to represent the number of chromosomes in a single set, examples in animals are more common in non-vertebrates such as flatworms, leeches, and brine shrimp. Within vertebrates, examples of stable polyploidy include the salmonids and many cyprinids, some fish have as many as 400 chromosomes. Polyploidy also occurs commonly in amphibians, for example the biomedically-important Xenopus genus contains many different species with as many as 12 sets of chromosomes, polyploid lizards are also quite common, but are sterile and must reproduce by parthenogenesis. While mammalian liver cells are polyploid, rare instances of polyploid mammals are known, an octodontid rodent of Argentinas harsh desert regions, known as the plains viscacha rat has been reported as an exception to this rule. However, careful analysis using chromosome paints shows that there are two copies of each chromosome in T. barrerae, not the four expected if it were truly a tetraploid. This rodent is not a rat, but kin to guinea pigs and its new diploid number is 102 and so its cells are roughly twice normal size. Its closest living relation is Octomys mimax, the Andean Viscacha-Rat of the same family and it was therefore surmised that an Octomys-like ancestor produced tetraploid offspring that were, by virtue of their doubled chromosomes, reproductively isolated from their parents
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Fertile Crescent
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The Fertile Crescent is a crescent-shaped region containing the comparatively moist and fertile land of otherwise arid and semi-arid Western Asia, the Nile Valley and Nile Delta. Having originated in the study of ancient history, the concept developed and today retains meanings in international geopolitics. In current usage, all definitions of the Fertile Crescent include Mesopotamia, the land in and around the Tigris and Euphrates rivers, and the Levant, the eastern coast of the Mediterranean Sea. The region saw the development of some of the earliest human civilizations, technological advances made in the region include the development of writing, glass, the wheel, agriculture, and the use of irrigation. It is a region consisting chiefly of mountains in the north, the end of the western wing is Palestine, Assyria makes up a large part of the center, while the end of the eastern wing is Babylonia. This great semicircle, for lack of a name, may be called the Fertile Crescent and this desert-bay is a limestone plateau of some height—too high indeed to be watered by the Tigris and Euphrates, which have cut cañons obliquely across it. Hence we are obliged to coin a term and call it the Fertile Crescent, water sources include the Jordan River. The inner boundary is delimited by the dry climate of the Syrian Desert to the south, around the outer boundary are the Anatolian highlands to the north and the Sahara Desert to the west. As crucial as rivers and marshlands were to the rise of civilization in the Fertile Crescent, the area is important as the bridge between Africa and Eurasia. Coupled with the Saharan pump theory, this Middle Eastern land-bridge is of importance to the modern distribution of Old World flora and fauna. The Fertile Crescent had many diverse climates, and major climatic changes encouraged the evolution of many r type annual plants, the regions dramatic variety of elevation gave rise to many species of edible plants for early experiments in cultivation. The Fertile Crescent has a record of past human activity. The western zone around the Jordan and upper Euphrates rivers gave rise to the first known Neolithic farming settlements and this region, alongside Mesopotamia, also saw the emergence of early complex societies during the succeeding Bronze Age. There is also evidence from the region for writing and the formation of hierarchical statelevel societies. This has earned the region the nickname The cradle of civilization and it is in this region where the first libraries appeared, some 5,000 years ago. The oldest known library was found in northern Syria, in the ruins of Ebla— a major commercial center that was destroyed around 1650 BCE, both the Tigris and Euphrates start in the Taurus Mountains of what is today Turkey. Farmers in southern Mesopotamia had to protect their fields from flooding each year, to protect against flooding, they made levees. Since the Bronze Age, the regions natural fertility has been extended by irrigation works
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Near East
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The Near East is a geographical term that roughly encompasses Western Asia. Despite having varying definitions within different academic circles, the term was applied to the maximum extent of the Ottoman Empire. The term has fallen into disuse in English and has replaced by the terms Middle East. The Food and Agriculture Organization of the United Nations defines the region similarly, but also includes Afghanistan while excluding the countries of North Africa and the Palestinian territories. Up until 1912 the Ottomans retained a band of territory including Albania, Macedonia and Southern Thrace, the Ottoman Empire, believed to be about to collapse, was portrayed in the press as the sick man of Europe. The Balkan states, with the exception of Bosnia and Albania, were primarily Christian. Starting in 1894 the Ottomans struck at the Armenians on the grounds that they were a non-Muslim people. The Hamidian Massacres aroused the indignation of the entire Christian world, in the United States the now aging Julia Ward Howe, author of the Battle Hymn of the Republic, leaped into the war of words and joined the Red Cross. Relations of minorities within the Ottoman Empire and the disposition of former Ottoman lands became known as the Eastern Question and it now became relevant to define the east of the eastern question. In about the middle of the 19th century Near East came into use to describe part of the east closest to Europe. The term Far East appeared contemporaneously meaning Japan, China, Korea, Indonesia, near East applied to what had been mainly known as the Levant, which was in the jurisdiction of the Ottoman Porte, or government. Those who used the term had little choice about its meaning and they could not set foot on most of the shores of the southern and central Mediterranean from the Gulf of Sidra to Albania without permits from the Ottoman Empire. Some regions beyond the Ottoman Porte were included, one was North Africa west of Egypt. It was occupied by piratical kingdoms of the Barbary Coast, de facto independent since the 18th century, formerly part of the empire at its apogee. Iran was included because it could not easily be reached except through the Ottoman Empire or neighboring Russia, in the 1890s the term tended to focus on the conflicts in the Balkan states and Armenia. The demise of the man of Europe left considerable confusion as to what was to be meant by Near East. It is now used only in historical contexts, to describe the countries of Western Asia from the Mediterranean to Iran. There is, in short, no universally understood fixed inventory of nations and they appear together in the journals of the mid-19th century
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Bronze Age
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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
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Rye
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Rye is a grass grown extensively as a grain, a cover crop and a forage crop. It is a member of the tribe and is closely related to barley. Rye grain is used for flour, rye bread, rye beer, crisp bread, some whiskeys, some vodkas and it can also be eaten whole, either as boiled rye berries or by being rolled, similar to rolled oats. Rye is a grain and should not be confused with ryegrass, which is used for lawns, pasture. Rye is one of a number of species grow wild in central and eastern Turkey. It is possible that rye traveled west from Turkey as an admixture in wheat. Since the Middle Ages people have cultivated rye widely in Central and it serves as the main bread cereal in most areas east of the French-German border and north of Hungary. In Southern Europe, it was cultivated on marginal lands, claims of much earlier cultivation of rye, at the Epipalaeolithic site of Tell Abu Hureyra in the Euphrates valley of northern Syria remain controversial. Critics point to inconsistencies in the dates, and identifications based solely on grain. Winter rye is any breed of rye planted in the fall to provide cover for the winter. It grows during warmer days of the winter when sunlight temporarily warms the plant above freezing and it is sometimes used in winter gardens and is a common nurse crop. Rye is grown primarily in Eastern, Central and Northern Europe, the main rye belt stretches from northern Germany through Poland, Ukraine, Belarus, Lithuania and Latvia into central and northern Russia. Rye is also grown in North America, in South America, in Oceania, in Turkey, in Kazakhstan, production levels of rye have fallen in most of the producing nations, as of 2012. For instance, production of rye in Russia fell from 13.9 million metric tons in 1992 to 2.1 t in 2012, most rye is consumed locally or exported only to neighboring countries, rather than being shipped worldwide. Rye is highly susceptible to the ergot fungus, consumption of ergot-infected rye by humans and animals results in a serious medical condition known as ergotism. Ergotism can cause physical and mental harm, including convulsions, miscarriage, necrosis of digits, hallucinations. Historically, damp northern countries that have depended on rye as a staple crop were subject to epidemics of this condition. There have been occurrence of ergotism with periods where there were incidents of people persecuted for being witches
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Secondary crop
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Vavilovian mimicry is a form of mimicry in plants where a weed comes to share one or more characteristics with a domesticated plant through generations of artificial selection. It is named after Nikolai Vavilov, a prominent Russian plant geneticist who identified the centres of origin of cultivated plants, selection against the weed may occur by killing a young or adult weed, separating its seeds from those of the crop, or both. This has been done manually since Neolithic times, and in recent years by agricultural machinery. Vavilovian mimicry is an illustration of unintentional selection by humans. Although the human selective agents might be conscious of their impact on the local weed gene pool, such effects go against the goals of those growing crops. Weeders do not want to select weeds that are similar to the cultivated plant, yet the only other option is to let the weeds grow and compete with crops for sunlight. Similar situations include antibiotic resistance and, of nature to crop mimicry. This can be contrasted with forms of artificial selection that do tend toward a favorable outcome. Having acquired many desirable qualities by being subjected to selective pressures. Vavilov called these weeds-become-crops secondary crops, Vavilovian mimicry can be classified as reproductive, aggressive and, in the case of secondary crops, mutualistic. It is a form of disjunct mimicry with the model agreeable to the dupe, in disjunct mimicry complexes, three different species are involved as model, mimic and dupe—the weed, mimicking a protected crop model, with humans as signal receivers. In fact, the only protection relevant here is its usefulness to humans. Secondly, the weed is not eaten, but simply killed, the only motivation for killing the weed is its effect on crop yields. Farmers would prefer to have no weeds at all, but a predator would die if it had no prey to eat, finally, there is no known equivalent of Vavilovian mimicry in ecosystems unaltered by humans. Delbert Wiens has argued that secondary crops cannot be classified as mimics, because they result from artificial as opposed to natural selection, on this first point, Georges Pasteur points out that indirect artificial selection is involuntary and thus no different from natural selection. One case of Vavilovian mimicry is the gold-of-pleasure or false flax, which much like the flax plant Linum usitatissimum. The gold-of-pleasure is a descendant of Camelina gabrata, a wild species, weeding of the adult plant is impractical, instead they are separated based on properties of the seed. This is done by a machine, which in this case acts as an inanimate signal receiver
31.
Barley
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Barley, a member of the grass family, is a major cereal grain grown in temperate climates globally. It was one of the first cultivated grains, particularly in Eurasia as early as 10,000 years ago, Barley has been used as animal fodder, as a source of fermentable material for beer and certain distilled beverages, and as a component of various health foods. It is used in soups and stews, and in barley bread of various cultures, Barley grains are commonly made into malt in a traditional and ancient method of preparation. In 2014, barley was ranked fourth among grains in quantity produced behind corn, rice, the Old English word for barley was bære, which traces back to Proto-Indo-European and is cognate to the Latin word farina flour. The direct ancestor of modern English barley in Old English was the derived adjective bærlic, the first citation of the form bærlic in the Oxford English Dictionary dates to around 966 CE, in the compound word bærlic-croft. The underived word bære survives in the north of Scotland as bere, the word barn, which originally meant barley-house, is also rooted in these words. Barley is a member of the grass family and it is a self-pollinating, diploid species with 14 chromosomes. The wild ancestor of domesticated barley, Hordeum vulgare subsp, spontaneum, is abundant in grasslands and woodlands throughout the Fertile Crescent area of Western Asia and northeast Africa, and is abundant in disturbed habitats, roadsides and orchards. Outside this region, the barley is less common and is usually found in disturbed habitats. However, in a study of genome-wide diversity markers, Tibet was found to be a center of domestication of cultivated barley. Wild barley has a spike, upon maturity, the spikelets separate. Domesticated barley has nonshattering spikes, making it easier to harvest the mature ears. The nonshattering condition is caused by a mutation in one of two linked genes known as Bt1 and Bt2, many cultivars possess both mutations. The nonshattering condition is recessive, so varieties of barley that exhibit this condition are homozygous for the mutant allele, spikelets are arranged in triplets which alternate along the rachis. In wild barley, only the central spikelet is fertile, while the two are reduced. This condition is retained in certain cultivars known as two-row barleys, a pair of mutations result in fertile lateral spikelets to produce six-row barleys. Recent genetic studies have revealed that a mutation in one gene, two-row barley has a lower protein content than six-row barley, thus a more fermentable sugar content. High-protein barley is best suited for animal feed, Malting barley is usually lower protein which shows more uniform germination, needs shorter steeping, and has less protein in the extract that can make beer cloudy
32.
Russia
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Russia, also officially the Russian Federation, is a country in Eurasia. The European western part of the country is more populated and urbanised than the eastern. Russias capital Moscow is one of the largest cities in the world, other urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod. Extending across the entirety of Northern Asia and much of Eastern Europe, Russia spans eleven time zones and incorporates a range of environments. It shares maritime borders with Japan by the Sea of Okhotsk, the East Slavs emerged as a recognizable group in Europe between the 3rd and 8th centuries AD. Founded and ruled by a Varangian warrior elite and their descendants, in 988 it adopted Orthodox Christianity from the Byzantine Empire, beginning the synthesis of Byzantine and Slavic cultures that defined Russian culture for the next millennium. Rus ultimately disintegrated into a number of states, most of the Rus lands were overrun by the Mongol invasion. The Soviet Union played a role in the Allied victory in World War II. The Soviet era saw some of the most significant technological achievements of the 20th century, including the worlds first human-made satellite and the launching of the first humans in space. By the end of 1990, the Soviet Union had the second largest economy, largest standing military in the world. It is governed as a federal semi-presidential republic, the Russian economy ranks as the twelfth largest by nominal GDP and sixth largest by purchasing power parity in 2015. Russias extensive mineral and energy resources are the largest such reserves in the world, making it one of the producers of oil. The country is one of the five recognized nuclear weapons states and possesses the largest stockpile of weapons of mass destruction, Russia is a great power as well as a regional power and has been characterised as a potential superpower. The name Russia is derived from Rus, a state populated mostly by the East Slavs. However, this name became more prominent in the later history, and the country typically was called by its inhabitants Русская Земля. In order to distinguish this state from other states derived from it, it is denoted as Kievan Rus by modern historiography, an old Latin version of the name Rus was Ruthenia, mostly applied to the western and southern regions of Rus that were adjacent to Catholic Europe. The current name of the country, Россия, comes from the Byzantine Greek designation of the Kievan Rus, the standard way to refer to citizens of Russia is Russians in English and rossiyane in Russian. There are two Russian words which are translated into English as Russians
33.
Poland
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Poland, officially the Republic of Poland, is a country in Central Europe, situated between the Baltic Sea in the north and two mountain ranges in the south. Bordered by Germany to the west, the Czech Republic and Slovakia to the south, Ukraine and Belarus to the east, the total area of Poland is 312,679 square kilometres, making it the 69th largest country in the world and the 9th largest in Europe. With a population of over 38.5 million people, Poland is the 34th most populous country in the world, the 8th most populous country in Europe, Poland is a unitary state divided into 16 administrative subdivisions, and its capital and largest city is Warsaw. Other metropolises include Kraków, Wrocław, Poznań, Gdańsk and Szczecin, the establishment of a Polish state can be traced back to 966, when Mieszko I, ruler of a territory roughly coextensive with that of present-day Poland, converted to Christianity. The Kingdom of Poland was founded in 1025, and in 1569 it cemented a political association with the Grand Duchy of Lithuania by signing the Union of Lublin. This union formed the Polish–Lithuanian Commonwealth, one of the largest and most populous countries of 16th and 17th century Europe, Poland regained its independence in 1918 at the end of World War I, reconstituting much of its historical territory as the Second Polish Republic. In September 1939, World War II started with the invasion of Poland by Nazi Germany, followed thereafter by invasion by the Soviet Union. More than six million Polish citizens died in the war, after the war, Polands borders were shifted westwards under the terms of the Potsdam Conference. With the backing of the Soviet Union, a communist puppet government was formed, and after a referendum in 1946. During the Revolutions of 1989 Polands Communist government was overthrown and Poland adopted a new constitution establishing itself as a democracy, informally called the Third Polish Republic. Since the early 1990s, when the transition to a primarily market-based economy began, Poland has achieved a high ranking on the Human Development Index. Poland is a country, which was categorised by the World Bank as having a high-income economy. Furthermore, it is visited by approximately 16 million tourists every year, Poland is the eighth largest economy in the European Union and was the 6th fastest growing economy on the continent between 2010 and 2015. According to the Global Peace Index for 2014, Poland is ranked 19th in the list of the safest countries in the world to live in. The origin of the name Poland derives from a West Slavic tribe of Polans that inhabited the Warta River basin of the historic Greater Poland region in the 8th century, the origin of the name Polanie itself derives from the western Slavic word pole. In some foreign languages such as Hungarian, Lithuanian, Persian and Turkish the exonym for Poland is Lechites, historians have postulated that throughout Late Antiquity, many distinct ethnic groups populated the regions of what is now Poland. The most famous archaeological find from the prehistory and protohistory of Poland is the Biskupin fortified settlement, dating from the Lusatian culture of the early Iron Age, the Slavic groups who would form Poland migrated to these areas in the second half of the 5th century AD. With the Baptism of Poland the Polish rulers accepted Christianity and the authority of the Roman Church
34.
Australia
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Australia, officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It is the worlds sixth-largest country by total area, the neighbouring countries are Papua New Guinea, Indonesia and East Timor to the north, the Solomon Islands and Vanuatu to the north-east, and New Zealand to the south-east. Australias capital is Canberra, and its largest urban area is Sydney, for about 50,000 years before the first British settlement in the late 18th century, Australia was inhabited by indigenous Australians, who spoke languages classifiable into roughly 250 groups. The population grew steadily in subsequent decades, and by the 1850s most of the continent had been explored, on 1 January 1901, the six colonies federated, forming the Commonwealth of Australia. Australia has since maintained a liberal democratic political system that functions as a federal parliamentary constitutional monarchy comprising six states. The population of 24 million is highly urbanised and heavily concentrated on the eastern seaboard, Australia has the worlds 13th-largest economy and ninth-highest per capita income. With the second-highest human development index globally, the country highly in quality of life, health, education, economic freedom. The name Australia is derived from the Latin Terra Australis a name used for putative lands in the southern hemisphere since ancient times, the Dutch adjectival form Australische was used in a Dutch book in Batavia in 1638, to refer to the newly discovered lands to the south. On 12 December 1817, Macquarie recommended to the Colonial Office that it be formally adopted, in 1824, the Admiralty agreed that the continent should be known officially as Australia. The first official published use of the term Australia came with the 1830 publication of The Australia Directory and these first inhabitants may have been ancestors of modern Indigenous Australians. The Torres Strait Islanders, ethnically Melanesian, were originally horticulturists, the northern coasts and waters of Australia were visited sporadically by fishermen from Maritime Southeast Asia. The first recorded European sighting of the Australian mainland, and the first recorded European landfall on the Australian continent, are attributed to the Dutch. The first ship and crew to chart the Australian coast and meet with Aboriginal people was the Duyfken captained by Dutch navigator, Willem Janszoon. He sighted the coast of Cape York Peninsula in early 1606, the Dutch charted the whole of the western and northern coastlines and named the island continent New Holland during the 17th century, but made no attempt at settlement. William Dampier, an English explorer and privateer, landed on the north-west coast of New Holland in 1688, in 1770, James Cook sailed along and mapped the east coast, which he named New South Wales and claimed for Great Britain. The first settlement led to the foundation of Sydney, and the exploration, a British settlement was established in Van Diemens Land, now known as Tasmania, in 1803, and it became a separate colony in 1825. The United Kingdom formally claimed the part of Western Australia in 1828. Separate colonies were carved from parts of New South Wales, South Australia in 1836, Victoria in 1851, the Northern Territory was founded in 1911 when it was excised from South Australia
35.
Finland
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Finland, officially the Republic of Finland, is a sovereign state in Northern Europe. A peninsula with the Gulf of Finland to the south and the Gulf of Bothnia to the west, the country has borders with Sweden to the northwest, Norway to the north. Estonia is south of the country across the Gulf of Finland, Finland is a Nordic country situated in the geographical region of Fennoscandia, which also includes Scandinavia. Finlands population is 5.5 million, and the majority of the population is concentrated in the southern region,88. 7% of the population is Finnish people who speak Finnish, a Uralic language unrelated to the Scandinavian languages, the second major group are the Finland-Swedes. In terms of area, it is the eighth largest country in Europe, Finland is a parliamentary republic with a central government based in the capital Helsinki, local governments in 311 municipalities, and an autonomous region, the Åland Islands. Over 1.4 million people live in the Greater Helsinki metropolitan area, from the late 12th century, Finland was an integral part of Sweden, a legacy reflected in the prevalence of the Swedish language and its official status. In the spirit of the notion of Adolf Ivar Arwidsson, we are not Swedes, we do not want to become Russians, let us therefore be Finns, nevertheless, in 1809, Finland was incorporated into the Russian Empire as the autonomous Grand Duchy of Finland. In 1906, Finland became the nation in the world to give the right to vote to all adult citizens. Following the 1917 Russian Revolution, Finland declared itself independent, in 1918, the fledgling state was divided by civil war, with the Bolshevik-leaning Reds supported by the equally new Soviet Russia, fighting the Whites, supported by the German Empire. After a brief attempt to establish a kingdom, the became a republic. During World War II, the Soviet Union sought repeatedly to occupy Finland, with Finland losing parts of Karelia, Salla and Kuusamo, Petsamo and some islands, Finland joined the United Nations in 1955 and established an official policy of neutrality. The Finno-Soviet Treaty of 1948 gave the Soviet Union some leverage in Finnish domestic politics during the Cold War era, Finland was a relative latecomer to industrialization, remaining a largely agrarian country until the 1950s. It rapidly developed an advanced economy while building an extensive Nordic-style welfare state, resulting in widespread prosperity, however, Finnish GDP growth has been negative in 2012–2014, with a preceding nadir of −8% in 2009. Finland is a top performer in numerous metrics of national performance, including education, economic competitiveness, civil liberties, quality of life, a large majority of Finns are members of the Evangelical Lutheran Church, though freedom of religion is guaranteed under the Finnish Constitution. The first known appearance of the name Finland is thought to be on three rune-stones. Two were found in the Swedish province of Uppland and have the inscription finlonti, the third was found in Gotland, in the Baltic Sea. It has the inscription finlandi and dates from the 13th century, the name can be assumed to be related to the tribe name Finns, which is mentioned first known time AD98. The name Suomi has uncertain origins, but a candidate for a source is the Proto-Baltic word *źemē, in addition to the close relatives of Finnish, this name is also used in the Baltic languages Latvian and Lithuanian
36.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
37.
United Nations
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The United Nations is an intergovernmental organization to promote international co-operation. A replacement for the ineffective League of Nations, the organization was established on 24 October 1945 after World War II in order to prevent another such conflict, at its founding, the UN had 51 member states, there are now 193. The headquarters of the UN is in Manhattan, New York City, further main offices are situated in Geneva, Nairobi, and Vienna. The organization is financed by assessed and voluntary contributions from its member states, the UNs mission to preserve world peace was complicated in its early decades by the Cold War between the US and Soviet Union and their respective allies. The organization participated in actions in Korea and the Congo. After the end of the Cold War, the UN took on major military, the UN has six principal organs, the General Assembly, the Security Council, the Economic and Social Council, the Secretariat, the International Court of Justice, and the UN Trusteeship Council. UN System agencies include the World Bank Group, the World Health Organization, the World Food Programme, UNESCO, the UNs most prominent officer is the Secretary-General, an office held by Portuguese António Guterres since 2017. Non-governmental organizations may be granted consultative status with ECOSOC and other agencies to participate in the UNs work, the organization won the Nobel Peace Prize in 2001, and a number of its officers and agencies have also been awarded the prize. Other evaluations of the UNs effectiveness have been mixed, some commentators believe the organization to be an important force for peace and human development, while others have called the organization ineffective, corrupt, or biased. Following the catastrophic loss of life in the First World War, the earliest concrete plan for a new world organization began under the aegis of the US State Department in 1939. It incorporated Soviet suggestions, but left no role for France, four Policemen was coined to refer to four major Allied countries, United States, United Kingdom, Soviet Union, and China, which emerged in the Declaration by United Nations. Roosevelt first coined the term United Nations to describe the Allied countries, the term United Nations was first officially used when 26 governments signed this Declaration. One major change from the Atlantic Charter was the addition of a provision for religious freedom, by 1 March 1945,21 additional states had signed. Each Government pledges itself to cooperate with the Governments signatory hereto, the foregoing declaration may be adhered to by other nations which are, or which may be, rendering material assistance and contributions in the struggle for victory over Hitlerism. During the war, the United Nations became the term for the Allies. To join, countries had to sign the Declaration and declare war on the Axis, at the later meetings, Lord Halifax deputized for Mr. Eden, Wellington Koo for T. V. Soong, and Mr Gromyko for Mr. Molotov. The first meetings of the General Assembly, with 51 nations represented, the General Assembly selected New York City as the site for the headquarters of the UN, and the facility was completed in 1952. Its site—like UN headquarters buildings in Geneva, Vienna, and Nairobi—is designated as international territory, the Norwegian Foreign Minister, Trygve Lie, was elected as the first UN Secretary-General
38.
Food and Agriculture Organization
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The Food and Agriculture Organization of the United Nations is an agency of the United Nations that leads international efforts to defeat hunger. Serving both developed and developing countries, FAO acts as a forum where all nations meet as equals to negotiate agreements. Its Latin motto, fiat panis, translates as let there be bread, as of 6 January 2017, FAO has 194 member states, along with the European Union, and the Faroe Islands and Tokelau, which are associate members. The idea of an organization for food and agriculture emerged in the late 19th and early 20th century. In May–June 1905, a conference was held in Rome, Italy. Later in 1943, the United States President Franklin D. Roosevelt called a United Nations Conference on Food, representatives from forty four governments gathered at The Homestead Resort in Hot Springs, Virginia from 18 May to 3 June. The First Session of the FAO Conference was held in the Chateau frontenac at Quebec, Canada, the Second World War effectively ended the International Agricultural Institute, though it was only officially dissolved by resolution of its Permanent Committee on 27 February 1948. Its functions were transferred to the recently established FAO. In 1951, FAOs headquarters were moved from Washington, D. C, the agency is directed by the Conference of Member Nations, which meets every two years to review the work carried out by the organization and to Work and Budget for the next two-year period. The Conference elects a council of 49 member states that acts as a governing body, and the Director-General. Beginning in 1994, FAO underwent the most significant restructuring since its founding, to operations, streamline procedures. As a result, savings of about US$50 million, €35 million a year were realized, FAOs Regular Programme budget is funded by its members, through contributions set at the FAO Conference. The total FAO Budget planned for 2016-17 is USD2.6 billion, the voluntary contributions are expected to reach approximately US$1.6 billion in 2016-17. The world headquarters are located in Rome, in the seat of the Department of Italian East Africa. One of the most notable features of the building was the Axum Obelisk which stood in front of the agency seat and it was taken from Ethiopia by Benito Mussolinis troops in 1937 as a war chest, and returned on 18 April 2005. C. Reduce rural poverty – help the rural poor gain access to the resources and services they need – including rural employment, enable inclusive and efficient agricultural and food systems – help to build safe and efficient food systems that support smallholder agriculture and reduce poverty and hunger in rural areas. Two fundamental areas of work – gender and governance - are fully integrated in the strategic objective action plans. In 1996, FAO organised the World Food Summit, attended by 112 Heads or Deputy Heads of State, the Summit concluded with the signing of the Rome Declaration, which established the goal of halving the number of people who suffer from hunger by the year 2015
39.
Temperate
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In geography, temperate or tepid latitudes of Earth lie between the tropics and the polar regions. The temperatures in these regions are relatively moderate, rather than extremely hot or cold. The north temperate zone extends from the Tropic of Cancer to the Arctic Circle, the south temperate zone extends from the Tropic of Capricorn to the Antarctic Circle. In some climate classifications, the zone is often divided into several smaller climate zones. These include Humid subtropical climate, Mediterranean climate, oceanic, subtropical climates are located between 23. 5° and 35. 0° north or south latitude on the eastern or leeward sides of landmasses. This climate has long, generally hot, summers and short, mild winters and these climates may occur in southern Asia, the southeastern United States, parts of eastern Australia, and in eastern coastal South America. Mediterranean climates, occur between 30° and 42° north and south latitude, on the sides of landmasses. This climate has hot summers and short mild winters, however, seasonal rainfall is the opposite of that of the subtropical humid type. These climates occur near the rimlands of the Mediterranean Sea, in western Australia, in California, the oceanic climates occur in the higher middle latitudes, between 45° and 60° north and south latitude. They are created by the flow from the cool high latitude oceans to their west. This causes the climate to have cool summers and cool winters, annual rainfall is spread throughout the entire year. Regions with this climate include Western Europe, northwestern North America, the Continental climates occur in middle latitudes, between 35° or 40° to 55°. These climates are normally inland or on sides of landmasses. They feature warm to hot summers and cold winters, with a large temperature variation. Regions with this climate include northern temperate Asia, the northern United States, southern Canada, the vast majority of the worlds human population resides in temperate zones, especially in the northern hemisphere, due to its greater mass of land. The richest temperate flora in the world is found in southern Africa, geographical zone Habitat Köppen climate classification Middle latitudes Polar circle Subtropics
40.
Annual plant
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An annual plant is a plant that completes its life cycle, from germination to the production of seed, within one year, and then dies. Summer annuals germinate during spring or early summer and mature by autumn of the same year, winter annuals germinate during the autumn and mature during the spring or summer of the following calendar year. One seed-to-seed life cycle for an annual can occur in as little as a month in some species, oilseed rapa can go from seed-to-seed in about five weeks under a bank of fluorescent lamps. This style of growing is used in classrooms for education. Many desert annuals are therophytes, because their life cycle is only weeks. In cultivation, many plants are, or are grown as, annuals. Some perennials and biennials are grown in gardens as annuals for convenience, carrot, celery and parsley are true biennials that are usually grown as annual crops for their edible roots, petioles and leaves, respectively. Tomato, sweet potato and bell pepper are tender perennials usually grown as annuals, ornamental perennials commonly grown as annuals are impatiens, wax begonia, snapdragon, Pelargonium, coleus and petunia. Examples of true annuals include corn, wheat, rice, lettuce, peas, watermelon, beans, zinnia, summer annuals sprout, flower, produce seed, and die, during the warmer months of the year. The lawn weed crabgrass is a summer annual, winter annuals germinate in autumn or winter, live through the winter, then bloom in winter or spring. The plants grow and bloom during the season when most other plants are dormant or other annuals are in seed form waiting for warmer weather to germinate. Winter annuals die after flowering and setting seed, the seeds germinate in the autumn or winter when the soil temperature is cool. Winter annuals typically grow low to the ground, where they are sheltered from the coldest nights by snow cover. Some common winter annuals include henbit, deadnettle, chickweed, ironically, the property that they prevent the soil from drying out can also be problematic for commercial agriculture. In 2008, it was discovered that the inactivation of only two genes in one species of annual plant leads to the conversion into a perennial plant, researchers deactivated the SOC1 and FUL genes in Arabidopsis thaliana, which control flowering time. This switch established phenotypes common in plants, such as wood formation
41.
Tonne
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The SI symbol for the tonne is t, adopted at the same time as the unit itself in 1879. Its use is also official, for the metric ton, within the United States, having been adopted by the US National Institute of Standards and it is a symbol, not an abbreviation, and should not be followed by a period. Informal and non-approved symbols or abbreviations include T, mT, MT, in French and all English-speaking countries that are predominantly metric, tonne is the correct spelling. Before metrication in the UK the unit used for most purposes was the Imperial ton of 2,240 pounds avoirdupois, equivalent to 1,016 kg, differing by just 1. 6% from the tonne. Ton and tonne are both derived from a Germanic word in use in the North Sea area since the Middle Ages to designate a large cask. A full tun, standing about a high, could easily weigh a tonne. An English tun of wine weighs roughly a tonne,954 kg if full of water, in the United States, the unit was originally referred to using the French words millier or tonneau, but these terms are now obsolete. The Imperial and US customary units comparable to the tonne are both spelled ton in English, though they differ in mass, one tonne is equivalent to, Metric/SI,1 megagram. Equal to 1000000 grams or 1000 kilograms, megagram, Mg, is the official SI unit. Mg is distinct from mg, milligram, pounds, Exactly 1000/0. 453 592 37 lb, or approximately 2204.622622 lb. US/Short tons, Exactly 1/0. 907 184 74 short tons, or approximately 1.102311311 ST. One short ton is exactly 0.90718474 t, imperial/Long tons, Exactly 1/1. 016 046 9088 long tons, or approximately 0.9842065276 LT. One long ton is exactly 1.0160469088 t, for multiples of the tonne, it is more usual to speak of thousands or millions of tonnes. Kilotonne, megatonne, and gigatonne are more used for the energy of nuclear explosions and other events. When used in context, there is little need to distinguish between metric and other tons, and the unit is spelt either as ton or tonne with the relevant prefix attached. *The equivalent units columns use the short scale large-number naming system used in most English-language countries. †Values in the equivalent short and long tons columns are rounded to five significant figures, ǂThough non-standard, the symbol kt is also sometimes used for knot, a unit of speed for sea-going vessels, and should not be confused with kilotonne. A metric ton unit can mean 10 kilograms within metal trading and it traditionally referred to a metric ton of ore containing 1% of metal. In the case of uranium, the acronym MTU is sometimes considered to be metric ton of uranium, in the petroleum industry the tonne of oil equivalent is a unit of energy, the amount of energy released by burning one tonne of crude oil, approximately 42 GJ
42.
Flour
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Flour is a powder made by grinding raw grains or roots and used to make many different foods. While wheat is the most common base for flour, maize flour has been important in Mesoamerican cuisine since ancient times, rye flour is a constituent of bread in central Europe. The English word flour is originally a variant of the word flower, both derive from the Old French fleur or flour, which had the literal meaning blossom, and a figurative meaning the finest. The phrase fleur de farine meant the finest part of the meal, since flour resulted from the elimination of coarse, the earliest archaeological evidence for wheat seeds crushed between simple millstones to make flour dates to 6000 BC. The Romans were the first to grind seeds on cone mills, in 1879, at the beginning of the Industrial Era, the first steam mill was erected in London. In the 1930s, some began to be enriched with iron, niacin, thiamine. In the 1940s, mills started to enrich flour and folic acid was added to the list in the 1990s, an important problem of the industrial revolution was the preservation of flour. Transportation distances and a relatively slow distribution system collided with natural shelf life, the reason for the limited shelf life is the fatty acids of the germ, which react from the moment they are exposed to oxygen. This occurs when grain is milled, the fatty acids oxidize, depending on climate and grain quality, this process takes six to nine months. In the late 19th century, this process was too short for a production and distribution cycle. As vitamins, micronutrients and amino acids were completely or relatively unknown in the late 19th century, without the germ, flour cannot become rancid. Degermation started in densely populated areas and took approximately one generation to reach the countryside, heat-processed flour is flour where the germ is first separated from the endosperm and bran, then processed with steam, dry heat or microwave and blended into flour again. Milling of flour is accomplished by grinding grain between stones or steel wheels, today, stone-ground usually means that the grain has been ground in a mill in which a revolving stone wheel turns over a stationary stone wheel, vertically or horizontally with the grain in between. These terms are now applied broadly to uses of water. More recently, the Unifine mill, a mill, was developed in the mid-20th century. Home users have begun grinding their own flour from organic wheat berries on a variety of electric flour mills, the grinding process is not much different from grinding coffee but the mills are larger. This provides fresh flour with the benefits of wheat germ and fiber without spoilage, Flour contains a high proportion of starches, which are a subset of complex carbohydrates also known as polysaccharides. The kinds of used in cooking include all-purpose flour, self-rising flour
43.
Porridge
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Porridge is a dish made by boiling ground, crushed, or chopped starchy plants – typically grain – in water or milk. It is often cooked or served with such as sugar, honey, etc. to make a sweet dish, or mixed with spices, vegetables. It is usually served hot in a bowl, the term is often used specifically for oat porridge, which is eaten for breakfast with salt, sugar, milk, cream, or butter, and sometimes other flavorings. Oat porridge is also sold in ready-made or partly cooked form as an instant breakfast, other grains used for porridge include semolina, rice, wheat, barley, corn, triticale, and buckwheat. Many types of porridge have their own names, such as polenta, grits, porridge is a staple food in much of Africa, and historically was also a staple in much of Northern Europe and Russia. Porridge is easy to digest, so it is used traditionally in many cultures as a food for the sick, oat porridge, traditional and common in the English-speaking world, Germany and the Nordic countries. Oat porridge has been found in the stomachs of 5, 000-year-old Neolithic bog bodies in Central Europe, varieties of oat porridge include, Groats, a porridge made from unprocessed oats or wheat. Gruel, very thin porridge, often rather than eaten. Yod Kerch, an oat porridge from the north-west of France, primarily Brittany, made with oats, water or milk. Owsianka, an east European traditional breakfast made with hot milk, oats, porridge made from rolled oats or ground oatmeal is common in Scotland, England, Wales, Australia, New Zealand, North America, Finland and Scandinavia. It is known as simply porridge or, more commonly in the United States and Canada, rolled oats are commonly used in England, oatmeal in Scotland, and steel-cut oats in Ireland. Porridge – Anglophone Caribbean Also known as Pap, the most common type is corn meal, and they are always made with milk. Varieties include oatmeal, grated green plantain, barley, cream of wheat, oatmeal porridge is often flavored with cinnamon, nutmeg, brown sugar and/or almond essence. Stirabout – Irish porridge, traditionally made by stirring oats into boiling water Terci de ovăz, in the Royal Navy during the Napoleonic Wars, cooks made burgoo for the men for breakfast, from coarse oatmeal and water. Maize porridge, Atole, a Mexican dish of corn flour in water or milk, champurrado, a Mexican blend of sugar, milk, chocolate and corn dough or corn flour. The Philippine dish tsampurado is similar, with instead of maize. Cir, Păsat, or Mămăligă are all Romanian maize porridges, cornmeal mush, a traditional dish in southern and mid-Atlantic US states. Gachas, a Spanish porridge of maize or grass peas, often garnished with roasted almonds and croutons of bread fried in olive oil
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Oatcake
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An oatcake is a type of flatbread similar to a cracker or biscuit, or in some versions takes the form of a pancake. They are prepared with oatmeal as the ingredient, and sometimes include plain or wholemeal flour as well. Oatcakes are cooked on a griddle or baked in an oven, Oatcakes have been documented as existing in Scotland since at least the time of the Roman conquest of Britain in AD43, and likely before then. Oatcakes have also described as being the mainstay of Scottish breads for centuries. Jean Le Bel, around AD 1357-60 describes the Beguine nuns making little pancakes rather like communion wafers and this is thought to be an early description of a Scottish oatcake. Oatcake variations exist based upon the different preparations in various countries, seen as a typically Scottish food item, oatcakes have also long been made elsewhere in Britain. Oatcakes may replace toast at breakfast in Scotland, queen Elizabeth II typically has Scottish oatcakes for breakfast and Walkers Oatcakes carry a Royal Warrant. British Prime Minister David Cameron named Scottish oatcakes as his favourite cake, the Staffordshire oatcake is quite different to those from Scotland, being more of a pancake in form, containing a significant proportion of wheat flour along with oatmeal. In Yorkshire, only one side of oatcakes is cooked, in Scotland, oatcakes are made on a girdle or by baking rounds of oatmeal on a tray. If the rounds are large, they are sliced into farls before baking, oats are one of the few grains that grow well in the north of Scotland and were, until the 20th century, the staple grain used. Scottish soldiers in the 14th century carried a plate and a sack of oatmeal. According to contemporary accounts, a soldier would heat the plate over fire, moisten a bit of oatmeal, hence it is no marvel that the Scots should be able to make longer marches than other men. Samuel Johnson referred, disparagingly, to this diet in his dictionary definition for oats, A grain, which in England is generally given to horses. Lord Elibank was said by Sir Walter Scott to have retorted Yes, the texture may vary from rough to fine depending on how the oats are ground. Oatcakes may be chewy or hard, depending on the water content. Oatcakes were traditionally eaten with every meal as a source of carbohydrate in the diet. From the 19th century onward, they were served to accompany soups, meat. Today, they are eaten as an alternative to bread or toast at breakfast
45.
Oatmeal cookie
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A cookie is a baked or cooked good that is small, flat, and sweet, usually containing flour, sugar and some type of oil or fat. It may include ingredients such as raisins, oats, chocolate chips or nuts. In most English-speaking countries except for the US and Canada, crisp cookies are called biscuits, chewier biscuits are sometimes called cookies even in the UK. Some cookies may also be named by their shape, such as squares or bars. Cookies or biscuits may be mass-produced in factories, made in bakeries or home-made. Cookies are often served with such as milk, coffee or tea. Factory-made cookies are sold in stores, convenience stores and vending machines. Fresh-baked cookies are sold at bakeries and coffeehouses, with the latter ranging from small business-sized establishments to multinational corporations such as Starbucks, in most English-speaking countries outside North America, including the United Kingdom, the most common word for a crisp cookie is biscuit. The term cookie is used to describe chewier ones. However, in many regions both terms are used, in Scotland the term cookie is sometimes used to describe a plain bun. Cookies that are baked as a layer on a sheet pan and then cut. According to the Scottish National Dictionary, its Scottish name derives from the form of the word cook, giving the Middle Scots cookie. It also gives an etymology, from the Dutch word koekje, the diminutive of koek. There was much trade and cultural contact across the North Sea between the Low Countries and Scotland during the Middle Ages, which can also be seen in the history of curling and, perhaps, golf. Cookies are most commonly baked until crisp or just long enough that they remain soft, Cookies are made in a wide variety of styles, using an array of ingredients including sugars, spices, chocolate, butter, peanut butter, nuts, or dried fruits. The softness of the cookie may depend on how long it is baked, a general theory of cookies may be formulated this way. Despite its descent from cakes and other sweetened breads, the cookie in almost all its forms has abandoned water as a medium for cohesion. Water in cakes serves to make the base as thin as possible, in the cookie, the agent of cohesion has become some form of oil
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Granola
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During the baking process, the mixture is stirred to maintain a loose breakfast cereal consistency. Dried fruit, such as raisins and dates, and confections such as chocolate are sometimes added, Granola, particularly if it includes flax seeds, is often used to improve digestion. Granola is often eaten in combination with yogurt, honey, fresh fruit and it also serves as a topping for various pastries, desserts or ice cream. Besides its use as a breakfast and snack food, granola may also be incorporated into some evening meal recipes, Granola is carried by people who are hiking, camping, or backpacking because it is nutritious, lightweight, high in calories, and easy to store. As a snack, it is combined with honey or corn syrup and condensed into a bar form that makes it easy to carry for packed lunches, hiking. The name is now a trademark only in Australia and New Zealand, the trademark is owned by the Australian Health & Nutrition Association Ltd. s Sanitarium Health Food Company in Australia and Australasian Conference Association Limited in New Zealand. Granula was invented in Dansville, New York, by Dr. James Caleb Jackson at the Jackson Sanitarium in 1863, the Jackson Sanitarium was a prominent health spa that operated into the early 20th century on the hillside overlooking Dansville. It was also known as Our Home on the Hillside, thus the company formed to sell Jacksons cereal was known as the Our Home Granula Company, Granula was composed of Graham flour and was similar to an oversized form of Grape-Nuts. A similar cereal was developed by John Harvey Kellogg and it too was initially known as Granula, but the name was changed to Granola to avoid legal problems with Jackson. The food and name were revived in the 1960s, and fruits and nuts were added to it to make it a food that was popular with the health. At the time, several people claim to have revived or re-invented granola, a major promoter was Layton Gentry, profiled in Time as Johnny Granola-Seed. In 1964, Gentry sold the rights to a recipe using oats. The company was founded in 1953 in Holly, Michigan by the Hurlinger family with the purpose of producing a concentrated paste of brewers yeast. Earlier in 1964, it had been bought by John Goodbrad and moved to Collegedale, Tennessee. In 1967, Gentry bought back the rights for west of the Rockies for $1,500 and then sold the west coast rights to Wayne Schlotthauer of Lassen Foods in Chico, California, Lassen was founded from a health food bakery run by Schlotthauers father-in-law. The Hurlingers, Goodbrads, and Schlotthauers were all Adventists, in 1972, an executive at Pet Milk of St. Louis, Missouri, introduced Heartland Natural Cereal, the first major commercial granola. At almost the time, Quaker introduced Quaker 100% Natural Granola. Within a year, Kelloggs had introduced its Country Morning granola cereal and General Mills had introduced its Nature Valley, in 1974, McKee Baking, makers of Little Debbie snack cakes, purchased Sovex
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Oat bread
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In Finland, bread is a very important food, served with almost every meal with many different types produced domestically. In the Swedish-speaking region of Åland, there are varieties of bread. Rye bread is a dark, sour bread produced in quantity in Finland, compared with the more internationally popular German style, Finnish rye-breads tend to be less oily or moist in texture. The most common types of Finnish rye breads are not sweet nor contain spices like caraway, as well as traditional breads more modern, softer breads exist as well these days. Rye bread is notable for its resistance to spoiling, it may store for weeks or months without developing mold, additionally, if left on the table, it quickly dries into a crisp that stores indefinitely. Traditional Eastern Finnish rye bread is called limppu and this bread is dark, sour in taste, dense, heavy and comparatively dryish. Its mouthfeel still remains soft enough to be bitten off easily and this kind of bread was usually produced at steady intervals throughout the year, whereas Western Finnish tradition stressed rare baking sessions combined with long-term storage. Limppu is common in the Upper Peninsula of Michigan due to levels of Finnish immigration and may be found in many pubs. Traditional Western Finnish rye bread was dried near the kitchen ceiling, nowadays this kind of bread is available in all its forms and stages of aging throughout the whole of Finland, regardless of season. Vaasan Ruispala, a brand of rye bread by Vaasan, is Finlands most popular bread according to the company and it is otherwise similar to reikäleipä, but is more consumer-oriented. The brand is not without competitors, two of them are Fazers Ruispuikulat, which are oblong in shape instead, and Oululainens Reissumies, which are round. Both competitors are distinctly more traditional in formulation than Ruispala, mainly changing the size, as rye bread is the staple one in Finland, the competition among the brands remains fierce to this day. The old tradition was that all bread in the house for the year was baked in a few days, thus, jälkiuunileipä could still be baked in the residual heat. The longer baking time in the lower temperature gives it a color, higher density and hardness than regular rye bread. In addition to the traditional shape, there are also rectangular ruispala-type pieces available. Crispbread are leavened rye breads that are dried into thin crisp and they are sometimes made using sour dough. Crispbread are very common throughout the Nordic countries and if stored properly will not spoil for a long time, variants of crisp bread are thicker, air-containing crisps and thinner sour crisps. The most common type, often associated with schools and other institutions, is rectangular in shape, e. g. Koulunäkki
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. PMID 25411276. doi:10.3945/ajcn.114.086108.
