1.
Shanghai Zoo
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Shanghai Zoo is the main zoological garden in Changning District, Shanghai, China. After half a century of development the Shanghai Zoo has become one of the best ecological gardens in Shanghai, the zoo is constantly developing and improving the animal enclosures in order to provide better environments for the animals and a pleasurable experience for visitors. The original golf course design has been basically preserved, there are a total of 100,000 trees with nearly 600 species planted in the zoo. The green areas and lawns cover an area of 100,000 square meters
2.
Conservation status
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The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Various systems of conservation status exist and are in use at international, multi-country, the IUCN Red List of Threatened Species is the best known worldwide conservation status listing and ranking system. Also included are species that have gone extinct since 500 AD, when discussing the IUCN Red List, the official term threatened is a grouping of three categories, critically endangered, endangered, and vulnerable. Widespread and abundant taxa are included in this category, Data deficient – Not enough data to make an assessment of its risk of extinction Not evaluated – Has not yet been evaluated against the criteria. The Convention on International Trade in Endangered Species of Wild Fauna and Flora aims to ensure that trade in specimens of wild animals. Many countries require CITES permits when importing plants and animals listed on CITES, in the European Union, the Birds and Habitats Directives are the legal instruments that evaluate the conservation status within the EU of species and habitats. NatureServe conservation status focuses on Latin America, United States, Canada, and it has been developed by scientists from NatureServe, The Nature Conservancy, and the network of natural heritage programs and data centers. It is increasingly integrated with the IUCN Red List system and its categories for species include, presumed extinct, possibly extinct, critically imperiled, imperiled, vulnerable, apparently secure, and secure. The system also allows ambiguous or uncertain ranks including inexact numeric ranks, NatureServe adds a qualifier for captive or cultivated only, which has a similar meaning to the IUCN Red List extinct in the wild status. The Red Data Book of the Russian Federation is used within the Russian Federation, in Australia, the Environment Protection and Biodiversity Conservation Act 1999 describes lists of threatened species, ecological communities and threatening processes. The categories resemble those of the 1994 IUCN Red List Categories & Criteria, prior to the EPBC Act, a simpler classification system was used by the Endangered Species Protection Act 1992. Some state and territory governments also have their own systems for conservation status, in Belgium, the Flemish Research Institute for Nature and Forest publishes an online set of more than 150 nature indicators in Dutch. In Canada, the Committee on the Status of Endangered Wildlife in Canada is a group of experts that assesses and designates which wild species are in danger of disappearing from Canada. Under the Species at Risk Act, it is up to the federal government, in China, the State, provinces and some counties have determined their key protected wildlife species. There is the China red data book, in Finland, a large number of species are protected under the Nature Conservation Act, and through the EU Habitats Directive and EU Birds Directive. In Germany, the Federal Agency for Nature Conservation publishes red lists of endangered species, india has the Wild Life Protection Act,1972, Amended 2003 and the Biological Diversity Act,2002. In Japan, the Ministry of Environment publishes a Threatened Wildlife of Japan Red Data Book, in the Netherlands, the Dutch Ministry of Agriculture, Nature and Food Quality publishes a list of threatened species, and conservation is enforced by the Nature Conservation Act 1998. Species are also protected through the Wild Birds and Habitats Directives, in New Zealand, the Department of Conservation publishes the New Zealand Threat Classification System lists
3.
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
4.
Animal
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Animals are multicellular, eukaryotic organisms of the kingdom Animalia. The animal kingdom emerged as a clade within Apoikozoa as the group to the choanoflagellates. Animals are motile, meaning they can move spontaneously and independently at some point in their lives and their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later in their lives. All animals are heterotrophs, they must ingest other organisms or their products for sustenance, most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. Animals can be divided broadly into vertebrates and invertebrates, vertebrates have a backbone or spine, and amount to less than five percent of all described animal species. They include fish, amphibians, reptiles, birds and mammals, the remaining animals are the invertebrates, which lack a backbone. These include molluscs, arthropods, annelids, nematodes, flatworms, cnidarians, ctenophores, the study of animals is called zoology. The word animal comes from the Latin animalis, meaning having breath, the biological definition of the word refers to all members of the kingdom Animalia, encompassing creatures as diverse as sponges, jellyfish, insects, and humans. Aristotle divided the world between animals and plants, and this was followed by Carl Linnaeus, in the first hierarchical classification. In Linnaeuss original scheme, the animals were one of three kingdoms, divided into the classes of Vermes, Insecta, Pisces, Amphibia, Aves, and Mammalia. Since then the last four have all been subsumed into a single phylum, in 1874, Ernst Haeckel divided the animal kingdom into two subkingdoms, Metazoa and Protozoa. The protozoa were later moved to the kingdom Protista, leaving only the metazoa, thus Metazoa is now considered a synonym of Animalia. Animals have several characteristics that set apart from other living things. Animals are eukaryotic and multicellular, which separates them from bacteria and they are heterotrophic, generally digesting food in an internal chamber, which separates them from plants and algae. They are also distinguished from plants, algae, and fungi by lacking cell walls. All animals are motile, if only at life stages. In most animals, embryos pass through a stage, which is a characteristic exclusive to animals. With a few exceptions, most notably the sponges and Placozoa and these include muscles, which are able to contract and control locomotion, and nerve tissues, which send and process signals
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Chordate
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Chordates are deuterostomes, as during the embryo development stage the anus forms before the mouth. They are also bilaterally symmetric coelomates, in the case of vertebrate chordates, the notochord is usually replaced by a vertebral column during development, and they may have body plans organized via segmentation. There are also additional extinct taxa, the Vertebrata are sometimes considered as a subgroup of the clade Craniata, consisting of chordates with a skull, the Craniata and Tunicata compose the clade Olfactores. Of the more than 65,000 living species of chordates, the worlds largest and fastest animals, the blue whale and peregrine falcon respectively, are chordates, as are humans. Fossil chordates are known from at least as early as the Cambrian explosion, Hemichordata, which includes the acorn worms, has been presented as a fourth chordate subphylum, but it now is usually treated as a separate phylum. The Hemichordata, along with the Echinodermata, form the Ambulacraria, the Chordata and Ambulacraria form the superphylum Deuterostomia, composed of the deuterostomes. Attempts to work out the relationships of the chordates have produced several hypotheses. All of the earliest chordate fossils have found in the Early Cambrian Chengjiang fauna. Because the fossil record of early chordates is poor, only molecular phylogenetics offers a prospect of dating their emergence. However, the use of molecular phylogenetics for dating evolutionary transitions is controversial and it has also proved difficult to produce a detailed classification within the living chordates. Attempts to produce family trees shows that many of the traditional classes are paraphyletic. While this has been known since the 19th century, an insistence on only monophyletic taxa has resulted in vertebrate classification being in a state of flux. Although the name Chordata is attributed to William Bateson, it was already in prevalent use by 1880, ernst Haeckel described a taxon comprising tunicates, cephalochordates, and vertebrates in 1866. Though he used the German vernacular form, it is allowed under the ICZN code because of its subsequent latinization, among the vertebrate sub-group of chordates the notochord develops into the spine, and in wholly aquatic species this helps the animal to swim by flexing its tail. In fish and other vertebrates, this develops into the spinal cord, the pharynx is the part of the throat immediately behind the mouth. In fish, the slits are modified to form gills, a muscular tail that extends backwards behind the anus. This is a groove in the wall of the pharynx. In filter-feeding species it produces mucus to gather food particles, which helps in transporting food to the esophagus and it also stores iodine, and may be a precursor of the vertebrate thyroid gland
6.
Mammal
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Mammals are any vertebrates within the class Mammalia, a clade of endothermic amniotes distinguished from reptiles by the possession of a neocortex, hair, three middle ear bones and mammary glands. All female mammals nurse their young with milk, secreted from the mammary glands, Mammals include the largest animals on the planet, the great whales. The basic body type is a quadruped, but some mammals are adapted for life at sea, in the air, in trees. The largest group of mammals, the placentals, have a placenta, Mammals range in size from the 30–40 mm bumblebee bat to the 30-meter blue whale. With the exception of the five species of monotreme, all modern mammals give birth to live young, most mammals, including the six most species-rich orders, belong to the placental group. The largest orders are the rodents, bats and Soricomorpha, the next three biggest orders, depending on the biological classification scheme used, are the Primates, the Cetartiodactyla, and the Carnivora. Living mammals are divided into the Yinotheria and Theriiformes There are around 5450 species of mammal, in some classifications, extant mammals are divided into two subclasses, the Prototheria, that is, the order Monotremata, and the Theria, or the infraclasses Metatheria and Eutheria. The marsupials constitute the group of the Metatheria, and include all living metatherians as well as many extinct ones. Much of the changes reflect the advances of cladistic analysis and molecular genetics, findings from molecular genetics, for example, have prompted adopting new groups, such as the Afrotheria, and abandoning traditional groups, such as the Insectivora. The mammals represent the only living Synapsida, which together with the Sauropsida form the Amniota clade, the early synapsid mammalian ancestors were sphenacodont pelycosaurs, a group that produced the non-mammalian Dimetrodon. At the end of the Carboniferous period, this group diverged from the line that led to todays reptiles. Some mammals are intelligent, with some possessing large brains, self-awareness, Mammals can communicate and vocalize in several different ways, including the production of ultrasound, scent-marking, alarm signals, singing, and echolocation. Mammals can organize themselves into fission-fusion societies, harems, and hierarchies, most mammals are polygynous, but some can be monogamous or polyandrous. They provided, and continue to provide, power for transport and agriculture, as well as commodities such as meat, dairy products, wool. Mammals are hunted or raced for sport, and are used as model organisms in science, Mammals have been depicted in art since Palaeolithic times, and appear in literature, film, mythology, and religion. Defaunation of mammals is primarily driven by anthropogenic factors, such as poaching and habitat destruction, Mammal classification has been through several iterations since Carl Linnaeus initially defined the class. No classification system is accepted, McKenna & Bell and Wilson & Reader provide useful recent compendiums. Though field work gradually made Simpsons classification outdated, it remains the closest thing to a classification of mammals
7.
Even-toed ungulate
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The even-toed ungulates are ungulates whose weight is borne equally by the third and fourth toes. By contrast, odd-toed ungulates, such as horses, bear their weight primarily on their third toe, the aquatic cetaceans evolved from within even-toed ungulates, and therefore modern taxonomic classification sometimes combines Artiodactyla and Cetacea into Cetartiodactyla. The oldest fossils of even-toed ungulates date back to the early Eocene, since these findings almost simultaneously appeared in Europe, Asia, and North America, it is very difficult to accurately determine the origin of artiodactyls. The fossils are classified as belonging to the family Dichobunidae, their best-known and these were small animals, some as small as a hare, with a slim build, lanky legs, and a long tail. The hind legs were longer than the front legs. The early to middle Eocene saw the emergence of the ancestors of most of todays mammals, two formerly widespread, but now extinct, families of even-toed ungulates were Enteledontidae and Anthracotheriidae. Entelodonts existed from the middle Eocene to the early Miocene in Eurasia and they had a stocky body with short legs and a massive head, which was characterized by two humps on the lower jaw bone. Anthracotheres had a large, porcine build, with short legs and this group appeared in the middle Eocene up until the Pliocene, and spread throughout Eurasia, Africa, and North America. Anthracothereres are thought to be the ancestors of hippos, and, likewise, hippopotamuses appeared in the late Miocene and occupied Africa and Asia – they never got to the Americas. The camels were, during parts of the Cenozoic, limited to North America. Among the North American camels were groups like the stocky, short-legged Merycoidodontidae and they first appeared in the late Eocene and developed a great diversity of species in North America. Only in the late Miocene or early Pliocene did they migrate from North America into Eurasia, the North American varieties became extinct around 10,000 years ago. Suina have been around since the Eocene, in the late Eocene or the Oligocene, two families stayed in Eurasia and Africa, the peccaries, which became extinct in the Old World, exist today only in the Americas. South America was settled by even-toed ungulates only in the Pliocene, with only the peccaries, lamoids, and various species of capreoline deer, South America has comparatively fewer artiodactyl families than other continents. The classification of artiodactyls was hotly debated because the ocean-dwelling cetaceans evolved from the land-dwelling even-toed ungulates, some semiaquatic even-toed ungulates are more closely related to the ocean-dwelling cetaceans than to the other even-toed ungulates. This makes the Artiodactyla as traditionally defined an invalid paraphyletic taxon, since it includes animals descended from a common ancestor, phylogenetic classification only recognizes monophyletic taxa, that is, groups that descend from a common ancestor and include all its descendants. To address this problem, the traditional order Artiodactyla and infraorder Cetacea are sometimes subsumed into the more inclusive Cetartiodactyla taxon, an alternative approach is to include both land-land dwelling even toed ungulates and ocean-dwelling cetaceans in a revised Artiodactyla taxon. Order Artiodactyla/Clade CetartiodactylaSuborder Tylopoda Family †Anoplotheriidae, molecular biology involves sequencing an organisms DNA and RNA and comparing the sequence with that of other living beings – the more similar they are, the more closely they are related
8.
Camelid
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Camelids are members of the biological family Camelidae, the only currently living family in the suborder Tylopoda. The extant members of group are, dromedary camels, Bactrian camels, wild Bactrian camels, llamas, alpacas, vicuñas. Camelids are even-toed ungulates classified in the order Cetartiodactyla, along with pigs, hippopotamuses, whales, deer, giraffes, cattle, goats, antelope, Camelids are large, strictly herbivorous animals with slender necks and long legs. They differ from ruminants in a number of ways and their dentition show traces of vestigial central incisors in the upper jaw, and the third incisors have developed into canine-like tusks. Camelids also have canine teeth and tusk-like premolars, which are separated from the molars by a gap. Because of this, camelids have to lie down by resting on their knees with their legs tucked underneath their bodies and they also have a unique type of antibodies which lack the light chain, in addition to the normal antibodies found in other mammals. These so-called heavy-chain antibodies are being used to develop single-domain antibodies with potential pharmaceutical applications, Camelids do not have hooves, rather they have two-toed feet with toenails and soft foot pads. Most of the weight of the animal rests on these tough, the South American camelids, adapted to steep and rocky terrain, can move the pads on their toes to maintain grip. Many fossil camelids were unguligrade and probably hooved, in contrast to all living species, Camelids are behaviorally similar in many ways, including their walking gait, in which both legs on the same side are moved simultaneously. Consequently, camelids large enough for human beings to ride have a typical swaying motion, dromedary camels, bactrian camels, llamas and alpacas are all induced ovulators. The three Afro-Asian camel species have developed adaptations to their lives in harsh, near-waterless environments. Wild populations of the Bactrian camel are even able to drink brackish water, comparative table of the seven extant species in the family Camelidae, Camelids are unusual in that their modern distribution is almost the inverse of their area of origin. Camelids first appeared early in the evolution of the even-toed ungulates, around 45 million years ago during the middle Eocene. Among the earliest camelids was the rabbit-sized Protylopus, which still had four toes on each foot, by the late Eocene, around 35 million years ago, camelids such as Poebrotherium had lost the two lateral toes, and were about the size of a modern goat. The family diversified and prospered, but remained confined to the North American continent until only two or three million years ago, when representatives arrived in Asia, and South America. A high arctic camel from this period has been documented in the far northern reaches of Canada. Fossil camelids show a wider variety than their modern counterparts, one North American genus, Titanotylopus, stood 3.5 m at the shoulder, compared with the about 2 m of the largest modern camelids. Other extinct camelids included small, gazelle-like animals, such as Stenomylus, finally, a number of very tall, giraffe-like camelids were adapted to feeding on leaves from high trees, including such genera as Aepycamelus, and Oxydactylus
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Camel
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A camel is an even-toed ungulate within the genus Camelus, bearing distinctive fatty deposits known as humps on its back. Bactrian camels take their name from the historical Bactria region of Central Asia, the term camel is derived via Latin and Greek from Hebrew or Phoenician gāmāl. Most of the camels are dromedaries while Bactrian camels and wild Bactrian camels make up only 6% of the total camel population. Camel may also be used broadly to describe any of the seven camel-like mammals in the family Camelidae. The average life expectancy of a camel is 40 to 50 years, a full-grown adult camel stands 1.85 m at the shoulder and 2.15 m at the hump. Camels can run at up to 65 km/h in short bursts, Bactrian camels weigh 300 to 1,000 kg and dromedaries 300 to 600 kg. For instance, the speed for the one humped camel is about 40 km/hour while the two humped camel has around 27.2 km/hour. The male dromedary camel has in its throat an organ called a dulla and it resembles a long, swollen, pink tongue hanging out of the side of its mouth. Camels mate by having both male and female sitting on the ground, with the male mounting from behind, the male usually ejaculates three or four times within a single mating session. Camelids are the ungulates to mate in a sitting position. Camels do not directly store water in their humps as was commonly believed. In hot and dry environments, within 8 to 10 days only the dromedary camels might consume water which during this period the third of their bodys weight may be reduced due to the dehydration. When this tissue is metabolized, it more than one gram of water for every gram of fat processed. This fat metabolization, while releasing energy, causes water to evaporate from the lungs during respiration, overall, Camels have a series of physiological adaptations that allow them to withstand long periods of time without any external source of water. Unlike other mammals, their red cells are oval rather than circular in shape. Camels are able to withstand changes in temperature and water consumption that would kill most other animals. Their temperature ranges from 34 °C at dawn and steadily increases to 40 °C by sunset, in general, to compare between camels and the other livestock, camels lose only 1. Camels rarely sweat, even when ambient temperatures reach 49 °C, any sweat that does occur evaporates at the skin level rather than at the surface of their coat, the heat of vaporization therefore comes from body heat rather than ambient heat
10.
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
11.
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
12.
10th edition of Systema Naturae
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The 10th edition of Systema Naturae is a book written by Carl Linnaeus and published in two volumes in 1758 and 1759, which marks the starting point of zoological nomenclature. In it, Linnaeus introduced binomial nomenclature for animals, something he had already done for plants in his 1753 publication of Species Plantarum, before 1758, most biological catalogues had used polynomial names for the taxa included, including earlier editions of Systema Naturae. The first work to consistently apply binomial nomenclature across the kingdom was the 10th edition of Systema Naturae. Names published before that date are unavailable, even if they would otherwise satisfy the rules, during Linnaeus lifetime, Systema Naturae was under continuous revision. The Animal Kingdom, Animals enjoy sensation by means of an organization, animated by a medullary substance, perception by nerves. They have members for the different purposes of life, organs for their different senses and they all originate from an egg. Their external and internal structure, their anatomy, habits, instincts. The list has been broken down into the six classes Linnaeus described for animals, Mammalia, Aves, Amphibia, Pisces, Insecta. These classes were created by studying the internal anatomy, as seen in his key. Warm, red blood Viviparous, Mammalia Oviparous, Aves Heart with 1 auricle,1 ventricle, cold, red blood Lungs voluntary, Amphibia External gills, Pisces Heart with 1 auricle,0 ventricles. Linnaeus described mammals as, Animals that suckle their young by means of lactiferous teats, in external and internal structure they resemble man, most of them are quadrupeds, and with man, their natural enemy, inhabit the surface of the Earth. The largest, though fewest in number, inhabit the ocean and they are areal, vocal, swift and light, and destitute of external ears, lips, teeth, scrotum, womb, bladder, epiglottis, corpus callosum and its arch, and diaphragm. They breathe by means of gills, which are united by a bony arch, swim by means of radiate fins. Many of them are without a head, and most of them without feet. They are principally distinguished by their tentacles, by the Ancients they were not improperly called imperfect animals, as being destitute of ears, nose, head, eyes and legs, and are therefore totally distinct from Insects. In addition to repeating the species he had listed in his Species Plantarum. The species from Species Plantarum were numbered sequentially, while the new species were labelled with letters, new plant species described in the 10th edition of Systema Naturae include, The original 1758 Systema Naturae Linnaeus 1758 Classification of Animals on the Taxonomicon
13.
Synonym (taxonomy)
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For example, Linnaeus was the first to give a scientific name to the Norway spruce, which he called Pinus abies. This name is no longer in use, it is now a synonym of the current scientific name which is Picea abies, unlike synonyms in other contexts, in taxonomy a synonym is not interchangeable with the name of which it is a synonym. In taxonomy, synonyms are not equals, but have a different status, for any taxon with a particular circumscription, position, and rank, only one scientific name is considered to be the correct one at any given time. A synonym cannot exist in isolation, it is always an alternative to a different scientific name, given that the correct name of a taxon depends on the taxonomic viewpoint used a name that is one taxonomists synonym may be another taxonomists correct name. Synonyms may arise whenever the same taxon is described and named more than once, independently. They may also arise when existing taxa are changed, as when two taxa are joined to one, a species is moved to a different genus. To the general user of scientific names, in such as agriculture, horticulture, ecology, general science. A synonym is a name that was used as the correct scientific name but which has been displaced by another scientific name. Thus Oxford Dictionaries Online defines the term as a name which has the same application as another. In handbooks and general texts, it is useful to have mentioned as such after the current scientific name. Synonyms used in this way may not always meet the strict definitions of the synonym in the formal rules of nomenclature which govern scientific names. Changes of scientific name have two causes, they may be taxonomic or nomenclatural, a name change may be caused by changes in the circumscription, position or rank of a taxon, representing a change in taxonomic, scientific insight. A name change may be due to purely nomenclatural reasons, that is, based on the rules of nomenclature, the earliest such name is called the senior synonym, while the later name is the junior synonym. One basic principle of zoological nomenclature is that the earliest correctly published name, synonyms are important because if the earliest name cannot be used, then the next available junior synonym must be used for the taxon. Objective synonyms refer to taxa with the type and same rank. For example, John Edward Gray published the name Antilocapra anteflexa in 1855 for a species of pronghorn, however, it is now commonly accepted that his specimen was an unusual individual of the species Antilocapra americana published by George Ord in 1815. Ords name thus takes precedence, with Antilocapra anteflexa being a subjective synonym. Objective synonyms are common at the level of genera, because for various reasons two genera may contain the type species, these are objective synonyms
14.
Friedrich August Rudolph Kolenati
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Friedrich August Rudolph Kolenati was a Czech-German botanist and zoologist active primarily in Prague and Brno. In 1842 he moved to Russia as an assistant in zoology at the St Petersburg Academy of Sciences, from 1842-1845 he participated in explorations of the Caucasus, ranging from the Azov Sea to Nagorno-Karabakh, and later conducted a survey of the lower Don River. In 1845 Kolenati returned to Prague, where he was named an Associate Professor of Natural History, in 1848 he played an active part in the revolutionary events of the time, for which he was subsequently arrested. After his release from prison, he lectures in mineralogy and zoology at the Prague Polytechnic Institute. In 1848 he co-founded the Lotos Science Association, and was appointed professor of natural science. In this department during his tenure significantly expanded its natural history collections and he died while on a research trip to Praděd and is buried in Little Morávka. Kolenati was a member of the Royal Czech Society of Sciences, published more than 50 entomological works and his collection of beetles from the first half of the 19th century has become one of the foundations of the National Museums entomological collection in Prague. Kolenati, F. A.1845, Meletemata Entomologica, bedrich Anton Kolenati Petropoli, Sumtibus Imperialis Academiae Scientiarum,2 Titelbl. Kolenati, F. A.1848, Genera et species Trichopterorum, heteropalpoidea, Pragae, pp. Kolenati, F. A.1857, Synopsis Prodroma der Nycteribien. Kolenati, F. A.1863, Beiträge zur Kenntniss der Phthirio – Myiarien
15.
Steppe
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In South Africa they are referred to as Veld. The prairie is an example of a steppe, though it is not usually called such and it may be semi-desert, or covered with grass or shrubs or both, depending on the season and latitude. The term is used to denote the climate encountered in regions too dry to support a forest. The soil is typically of chernozem type, steppes are usually characterized by a semi-arid and continental climate. Extremes can be recorded in the summer of up to 45 °C and in winter, besides this huge difference between summer and winter, the differences between day and night are also very great. In the highlands of Mongolia,30 °C can be reached during the day with sub-zero °C readings at night, the mid-latitude steppes can be summarized by hot summers and cold winters, averaging 250–510 mm of precipitation per year. Precipitation level alone is not what defines a steppe climate, potential evapotranspiration must also be taken into account, the Eurasian Grass-Steppe of the temperate grasslands, savannas, and shrublands had a role in the spread of the horse, the wheel, and the Indo-European languages. The Indo-European expansion and diverse invasions of horse archer civilizations of the steppe eventually led to, the Pannonian Plain is another steppe region in eastern Europe, primarily Hungary. Another large steppe area is located in the central United States, western Canada, the shortgrass prairie steppe is the westernmost part of the Great Plains region. The Channeled Scablands in Southern British Columbia and Washington State is an example of a region in North America outside of the Great Plains. In South America, cold steppe can be found in Patagonia, relatively small steppe areas can be found in the interior of the South Island of New Zealand. In Asia, a subtropical steppe can be found in semi-arid lands that fringe the Thar Desert of the Indian subcontinent, in Australia, subtropical steppe can be found in a belt surrounding the most severe deserts of the continent and around the Musgrave Ranges. Ecology and Conservation of Steppe-land Birds by Manuel B. Morales, Santi Mañosa, Jordi Camprodón, international Symposium on Ecology and Conservation of steppe-land birds
16.
Central Asia
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Central Asia stretches from the Caspian Sea in the west to China in the east and from Afghanistan in the south to Russia in the north. It is also referred to as the -stans as the five countries generally considered to be within the region all have names ending with the Persian suffix -stan. Central Asias five former Soviet republics are Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Central Asia has historically been closely tied to its nomadic peoples and the Silk Road. It has acted as a crossroads for the movement of people, goods, the Silk Road connected Muslim lands with the people of Europe, India, and China. This crossroads position has intensified the conflict between tribalism and traditionalism and modernization, in pre-Islamic and early Islamic times, Central Asia was predominantly Iranian, peopled by Eastern Iranian-speaking Bactrians, Sogdians and Chorasmians and the semi-nomadic Scythians and Parthians. Central Asia is sometimes referred to as Turkestan, the idea of Central Asia as a distinct region of the world was introduced in 1843 by the geographer Alexander von Humboldt. The borders of Central Asia are subject to multiple definitions, historically built political geography and geoculture are two significant parameters widely used in the scholarly literature about the definitions of the Central Asia. The most limited definition was the one of the Soviet Union. This definition was also used outside the USSR during this period. However, the Russian culture has two terms, Средняя Азия and Центральная Азия. Since then, this has become the most common definition of Central Asia, the UNESCO general history of Central Asia, written just before the collapse of the USSR, defines the region based on climate and uses far larger borders. An alternative method is to define the region based on ethnicity and these areas include Xinjiang Uyghur Autonomous Region, the Turkic regions of southern Siberia, the five republics, and Afghan Turkestan. Afghanistan as a whole, the northern and western areas of Pakistan, the Tibetans and Ladakhi are also included. Insofar, most of the peoples are considered the indigenous peoples of the vast region. Central Asia is a large region of varied geography, including high passes and mountains, vast deserts. The vast steppe areas of Central Asia are considered together with the steppes of Eastern Europe as a geographical zone known as the Eurasian Steppe. Much of the land of Central Asia is too dry or too rugged for farming, the Gobi desert extends from the foot of the Pamirs, 77° E, to the Great Khingan Mountains, 116°–118° E. Central Asia has the following geographic extremes, The worlds northernmost desert, at Buurug Deliin Els, Mongolia, the Northern Hemispheres southernmost permafrost, at Erdenetsogt sum, Mongolia, 46°17′ N
17.
Dromedary
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The dromedary, also called the Arabian camel, is a large, even-toed ungulate with one hump on its back. The dromedary is the smallest of the three species of camel, adult males stand 1. 8–2 m at the shoulder, while females are 1. 7–1.9 m tall, males typically weigh between 400 and 600 kg, and females weigh between 300 and 540 kg. The species distinctive features include its long, curved neck, narrow chest, a single hump, the coat is generally a shade of brown. The hump,20 cm tall or more, is made of fat bound together by fibrous tissue, dromedaries are mainly active during daylight hours. They form herds of about 20 individuals, which are led by a dominant male. This camel feeds on foliage and desert vegetation, several adaptations, such as the ability to tolerate losing more than 30% of its water content. Mating occurs annually and peaks in the season, females bear a single calf after a gestation of 15 months. The dromedary has not occurred naturally in the wild for nearly 2,000 years and it was probably first domesticated in Somalia or the Arabian Peninsula about 4,000 years ago. In the wild, the dromedary inhabited arid regions, including the Sahara Desert, the domesticated dromedary is generally found in the semi-arid to arid regions of the Old World, mainly in Africa, and a significant feral population occurs in Australia. Products of the dromedary, including its meat and milk, support several north Arabian tribes, it is commonly used for riding. The common name comes from the Old French dromedaire or the Late Latin dromedarius. These originated from the Greek word dromas, δρομάς, meaning running or runner, used in Greek in the combination δρομάς κάμηλος, literally running camel, the first recorded use in English of the name dromedary occurred in the 14th century. The dromedary possibly originated in Arabia and is sometimes referred to as the Arabian camel. The dromedary shares the genus Camelus with the Bactrian camel and the wild Bactrian camel, the dromedary belongs to the family Camelidae. The ancient Greek philosopher Aristotle was the first to describe the species of Camelus and he named two species in his History of Animals, the one-humped Arabian camel and the two-humped Bactrian camel. The dromedary was given its current binomial name Camelus dromedarius by Swedish zoologist Carl Linnaeus in his 1758 publication Systema Naturae, the study showed the two tribes had diverged 25 million years ago, earlier than previously estimated from North American fossils. The dromedary and the Bactrian camel often interbreed to produce fertile offspring, where the ranges of the species overlap, such as in northern Punjab, Persia and Afghanistan, the phenotypic differences between them tend to decrease as a result of extensive crossbreeding. The fertility of their hybrid has given rise to speculation that the dromedary, however, a 1994 analysis of the mitochondrial cytochrome b gene showed the species display 10. 3% divergence in their sequences
18.
Domestication
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Charles Darwin recognized the small number of traits that made domestic species different from their wild ancestors. There is a difference between domestic and wild populations. The dog was the first domesticated vertebrate, and was established across Eurasia before the end of the Late Pleistocene era, well before cultivation and before the domestication of other animals. Among birds, the domestic species today is the chicken, important for meat and eggs, though economically valuable poultry include the turkey, guineafowl. Birds are also kept as cagebirds, from songbirds to parrots. The longest established invertebrate domesticates are the bee and the silkworm. Terrestrial snails are raised for food, while species from several phyla are kept for research, the domestication of plants began at least 12,000 years ago with cereals in the Middle East, and the bottle gourd in Asia. Agriculture developed in at least 11 different centres around the world, domesticating different crops, Domestication means belonging to the house. Animals domesticated for home companionship are usually called pets, while those domesticated for food or work are called livestock or farm animals and this definition recognizes both the biological and the cultural components of the domestication process and the impacts on both humans and the domesticated animals and plants. All past definitions of domestication have included a relationship between humans with plants and animals, but their differences lay in who was considered as the partner in the relationship. This new definition recognizes a mutualistic relationship in both partners gain benefits. Domestication has vastly enhanced the reproductive output of crop plants, livestock, Domestication syndrome is the suite of phenotypic traits arising during domestication that distinguish crops from their wild ancestors. The domestication of animals is the relationship between animals with the humans who have influence on their care and reproduction. Charles Darwin recognized the small number of traits that made domestic species different from their wild ancestors, there is a genetic difference between domestic and wild populations. Domestication should not be confused with taming, the beginnings of animal domestication involved a protracted coevolutionary process with multiple stages along different pathways. The dog was the first domesticant, and was established across Eurasia before the end of the Late Pleistocene era, well before cultivation and before the domestication of other animals. Humans did not intend to domesticate animals from, or at least they did not envision a domesticated animal resulting from, in both of these cases, humans became entangled with these species as the relationship between them, and the human role in their survival and reproduction, intensified. Although the directed pathway proceeded from capture to taming, the two pathways are not as goal-oriented and archaeological records suggest that they take place over much longer time frames
19.
Bactria
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Bactria or Bactriana was the name of a historical region in Central Asia. Bactria was located between the Hindu Kush mountain range and the Amu Darya river, covering the region that straddles modern-day Afghanistan, Uzbekistan and Tajikistan. The English name Bactria is derived from the Ancient Greek, Βακτριανή, analogous names include the Pashto and Persian, باختر, translit. Bākhtar, Uzbek, Балх, Tajik, Бохтар, Chinese, 大夏, pinyin, Dàxià and this region played a major role in Central Asian history. At certain times the political limits of Bactria stretched far beyond the frame of the Bactrian plain. The Bactria–Margiana Archaeological Complex is the modern designation for a Bronze Age culture of Central Asia. 2200–1700 BC, located in present-day eastern Turkmenistan, northern Afghanistan, southern Uzbekistan and western Tajikistan, centred on the upper Amu Darya and its sites were discovered and named by the Soviet archaeologist Viktor Sarianidi. The early Greek historian Ctesias, c.400 BC, alleged that the legendary Assyrian king Ninus had defeated a Bactrian king named Oxyartes in ca.2140 BC, or some 1000 years before the Trojan War. Since the decipherment of cuneiform in the 19th century, however, according to some writers, Bactria was the homeland of Indo-Iranian tribes who moved south-west into Iran and into north-western India around 2500–2000 BC. Later, it became the province of the Persian Empire in Central Asia. It was in these regions, where the soil of the mountainous country is surrounded by the Turanian desert. After Darius III had been defeated by Alexander the Great, the satrap of Bactria, Bessus attempted to organise a resistance but was captured by other warlords. He was then tortured and killed, however, in the south, beyond the Oxus, he met strong resistance. After two years of war and an insurgency campaign, Alexander managed to establish little control over Bactria. After Alexanders death, Diodorus Siculus tells us that Philip received dominion over Bactria, at the Treaty of Triparadisus, both Diodorus Siculus and Arrian agree that the satrap Stasanor gained control over Bactria. Eventually, Alexanders empire was divided up among the generals in Alexanders army, Bactria became a part of the Seleucid Empire, named after its founder, Seleucus I. The Macedonians, especially Seleucus I and his son Antiochus I, established the Seleucid Empire, the Greek language became dominant for some time there. The paradox that Greek presence was more prominent in Bactria than in areas far closer to Greece can possibly be explained by past deportations of Greeks to Bactria
20.
Pack animal
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Traditional pack animals are diverse, including camels, goats, yaks, reindeer, water buffalo, and llamas, as well as the more familiar horses, donkeys and mules. The term pack animal is used in contrast to draft animal. For instance, sled dogs pull loads but do not normally carry them, traditional pack animals include ungulates such as camels, the yak, reindeer, goats, water buffalo and llama, and domesticated members of the horse family including horses, donkeys and mules. Occasionally, dogs can be used to carry small loads, hauling of goods in wagons with horses and oxen gradually displaced the use of packhorses, which had been important until the Middle Ages, by the sixteenth century. Pack animals may be fitted with saddles and may also carry saddlebags. The use of animals is considered a valid means of viewing and experiencing some National Parks in America, subject to guidelines. In the 21st century, special forces have received guidance on the use of horses, mules, llamas, camels, dogs, the maximum load for a camel is roughly 300 kg. Yaks are loaded differently according to region, in Sichuan,75 kg is carried for 30 km in 6 hours. In Qinghai, at 4100 m altitude, packs of up to 300 kg are routinely carried, llamas can carry roughly 1/4 of their body weight, so an adult male of 200 kg can carry some 50 kg. The US Army specifies a maximum of 20 percent of weight for mules walking up to 20 miles a day in mountains. However an 1867 text mentioned a load of up to 800 pounds, in India, the prevention of cruelty rules limit mules to 200 kg and ponies to 70 kg. Reindeer can carry up to 40 kg for a period in mountains
21.
Camel train
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A camel train or caravan is a series of camels carrying passengers and/or goods on a regular or semi-regular service between points. Camel trains were used sparingly elsewhere around the globe but during the 20th century they have been largely replaced by motorized vehicles or air traffic. By far the greatest use of camel trains occurs between North and West Africa by the Tuareg, Shuwa and Hassaniyya, as well as by culturally-affiliated groups like the Toubou, Hausa and these camel trains conduct trade in and around the Sahara Desert and Sahel. Trains travel as far south as central Nigeria and northern Cameroon in the west, in antiquity, the Arabian Peninsula was an important route for the trade with India and Abyssinia. Camel trains have long been used in portions of trans-Asian trade. As late as the twentieth century, camel caravans played an important role connecting the Beijing/Shanxi region of eastern China with Mongolian centers. The routes went across Inner and/or Outer Mongolia, United States The history of camel trains in the United States consists mainly of an experiment by the United States Army. On April 29,1856, thirty-three camels and five drivers arrived at Indianola, while camels were suited to the job of transport in the American Southwest, the experiment failed. Their stubbornness and aggressiveness made them unpopular among soldiers, and they frightened horses, many of the camels were sold to private owners, others escaped into the desert. These feral camels continued to be sighted through the early 20th century, British Columbia, Canada Camels were used from 1862 to 1863 in British Columbia, Canada during the Cariboo Gold Rush. Less important caravan routes served various other areas of northern China, such as most centers in todays Gansu, Ningxia, some of the oldest Hohhot-based caravan firms had a history dating to the early Qing Dynasty. Each of the rank-and-file caravan men, known as the camel-pullers, was in charge of one such file. Two files formed a ba, and the camel-pullers of the two files would help each other when loading cargo on the camels at the beginning of days march or unloading it when halted. To do their job properly camel-pullers had to be experts on camels, as Lattimore comments, because there is no good doctoring known for him when he is sick, they must learn how to keep him well. Put no more on this beast. » A caravan could consist of 150 or so camels, the caravan could carry a number of paying passengers as well, who would alternate between riding on top of a camel load and walking. Camel-pullers salary was low, although they were also fed and provided with tent space at the caravan owners expense. The caravan peoples food was mostly based around oat and millet flour, a sheep would be bought from the Mongols and slaughtered every now and then, and tea was the usual daily drink, as fresh vegetables were scarce, scurvy was a danger. Besides the paid cargo and the food and gear for the men and it was estimated that, when leaving its point of origin, for every 100 loads of merchandise the caravan would carry around 30 loads of fodder
22.
Silk Road
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While the term is of modern coinage, the Silk Road derives its name from the lucrative trade in silk carried out along its length, beginning during the Han dynasty. The Han dynasty expanded Central Asian sections of the routes around 114 BCE, largely through missions and explorations of the Chinese imperial envoy. The Chinese took great interest in the safety of their trade products, though silk was certainly the major trade item exported from China, many other goods were traded, as well as religions, syncretic philosophies, and various technologies. Diseases, most notably plague, also spread along the Silk Routes, in addition to economic trade, the Silk Road was a route for cultural trade among the civilizations along its network. The main traders during antiquity included the Chinese, Arabs, Turkmens, Indians, Persians, Somalis, Greeks, Syrians, Romans, Georgians, Armenians, Bactrians, in June 2014, UNESCO designated the Changan-Tianshan corridor of the Silk Road as a World Heritage Site. The Silk Road derives its name from the lucrative Eurasian silk and horse trade, the German terms Seidenstraße and Seidenstraßen were coined by Ferdinand von Richthofen, who made seven expeditions to China from 1868 to 1872. The term Silk Route is also used, although the term was coined in the 19th century, it did not gain widespread acceptance in academia or popularity among the public until the 20th century. The first book entitled The Silk Road was by Swedish geographer Sven Hedin in 1938, the fall of the Soviet Union and Iron Curtain in 1989 led to a surge of public and academic interest in Silk Road sites and studies in the former Soviet republics of Central Asia. Use of the term Silk Road is not without its detractors and he notes that traditional authors discussing East-West trade such as Marco Polo and Edward Gibbon never labelled any route as a silk one in particular. From the 2nd millennium BCE, nephrite jade was being traded from mines in the region of Yarkand, some remnants of what was probably Chinese silk dating from 1070 BCE have been found in Ancient Egypt. The Great Oasis cities of Central Asia played a role in the effective functioning of the Silk Road trade. This style is reflected in the rectangular belt plaques made of gold and bronze, with other versions in jade. The tomb of a Scythian prince near Stuttgart, Germany, dated to the 6th century BCE, was excavated and found to have not only Greek bronzes but also Chinese silks. Scythians accompanied the Assyrian Esarhaddon on his invasion of Egypt, soghdian Scythian merchants played a vital role in later periods in the development of the Silk Road. By the time of Herodotus, the Royal Road of the Persian Empire ran some 2,857 km from the city of Susa on the Karun to the port of Smyrna on the Aegean Sea. It was maintained and protected by the Achaemenid Empire and had postal stations, by having fresh horses and riders ready at each relay, royal couriers could carry messages the entire distance in nine days, while normal travellers took about three months. The next major step in the development of the Silk Road was the expansion of the Greek empire of Alexander the Great into Central Asia and this later became a major staging point on the northern Silk Route. They continued to expand eastward, especially during the reign of Euthydemus, there are indications that he may have led expeditions as far as Kashgar in Chinese Turkestan, leading to the first known contacts between [China and the West around 200 BCE
23.
Mangystau Region
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Mangystau Region is a region of Kazakhstan. Its capital is Aktau, which has a population of 154,500, the region is located in the southwest of the country, and includes Mangyshlak Peninsula. It has much of Kazakhstans Caspian Shore and it also borders neighboring countries Turkmenistan and Uzbekistan. Mangystau also borders two other Kazakh regions, Aktobe Region and Atyrau Region, the area of the region is 165,600 square kilometers. Engineers discovered petroleum in the area in the days of the Soviet Union, drilling commenced, the territory of Mangystau includes lots of different landscapes and desert lands, Caspian lowland, plateaus, mountains, cavities, desert, mountains and mountain ridges. That kind of forms a original multigraded labyrinth, painted with green, yellow, pink. The highest point is Otpan mountain at 556 metres, the lowest point is the bottom of Karagie cavity,132 metres below sea level. Due to its vast territory, the region has a variety of climate conditions. The climate of north Mangystau is cold in winter due to its settlement in Ustyurt Plateau, on the whole, the climate is continental with cold winters and mild summers. The average temperature −3 °C in January and +26 °C in July, the average annual rainfall is 150 millimetres. The first written sources on Mangystau Region date back to the 9th century AD, according to Arabic geographers, it was uninhabited until the tenth century when groups opposing the Turkmen Oghuz settled and found sources of water and grassland. The mountain called Binkishlah would have marked the border between Khwarezm and the Khanate of the Khazars and these Turkmen were vassals of the Khazars, at the beginning of the thirteenth century when Yaqut al-Hamawi and Ibn al-Athir mention the name of Mankashlagh. Ibn al-Athir tells of a Turkish principality with a medina with the name as the territory that existed from the late eleventh century. In 1097 a struggle between Kutb al-Din Muhammad, Khwarezm governor of Seljuks and Tugrul Tehghin occurred, in 1127, Atsiz occupied the whole peninsula. During Khwarezmshah rule, it was part of firstly Gorgan province, in 1221, the Mongols occupied it. It was later passed to successively Golden Horde, Nogai Horde, Uzbek Khanate and Kazakh Khanate, some Salur and Ersari Turkmens left the region and migrated to Russia. In 1670, Anusha Khan who was khan of Khiva asked the Russian government to build a fortress to protect the peninsula for securing trade between Russia and Khwarezm, puntsuk Monchak and Ayuka deported most of Cawdor and Igdir groups of Turkmen to the Volga basin. For protecting trade, Anusha Khan annexed it to his territories in 1676, the Russians under Peter the Great sent an expedition led by the unfortunate Bekovich-Cherkassky, who established three forts on the coast of the Caspian Sea, but they were abandoned after one year
24.
Nubra Valley
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Nubra is a tri-armed valley located to the north east of Ladakh valley. Diskit the capital of Nubra is about 150 km north from Leh town, local scholars say that its original name was Ldumra. The Shyok River meets the Nubra or Siachan River to form a valley that separates the Ladakh. The Shyok river is a tributary of the Indus river, the average altitude of the valley is about 10,000 ft. i. e.3048 metres above the sea level. The common way to access this valley is to travel over the Khardung La pass from Leh town, foreign nationals are required to get a Protected area permit to visit the Nubra Valley. Since 1 May 2014 Indian citizens are no longer required to get an Inner Line Permit to visit the valley, like the rest of the Tibetan Plateau, Nubra is a high altitude cold desert with rare precipitation and scant vegetation except along river beds. The villages are irrigated and fertile, producing wheat, barley, peas, mustard, most of the Nubra Valley is inhabited by Nubra dialect or Nubra Skat speakers. Siachen Glacier lies to the north of the valley, the Sasser Pass and the famous Karakoram Pass lie to the northwest of the valley and connect Nubra with Uyghur. Previously there was much trade passing through the area with western Chinas Xinjiang, the people of Baltistan also used the Nubra valley for passage to Tibet. Diskit town in the valley have become the centre for people of the region. Diskit is the headquarters of the Nubra Valley and thus has lot of government offices with basic facilities and it is also connected by road with Leh. The 32 metre Maitreya Buddha statue is the landmark of Nubra Valley and is maintained by the Diskit Monastery, along the Nubra or Siachan River lie the villages of Sumur, Kyagar, Tirith, Panamik, Turtuk and many others. Samstanling monastery is between Kyagar and Sumur villages, and Panamik is noted for its hot springs, across the Nubra or Siachan River at Panamik, is the isolated Ensa Gompa. On the Shyok River, the village, Diskit, is home to the dramatically positioned Diskit Monastery which is built in 1420 AD. Hundar was the capital of the erstwhile Nubra kingdom in the 17th century, between Hundar and Diskit lie several kilometres of sand dunes, and bactrian camels graze in the neighbouring forests of seabuckthorn. Non-locals are not allowed below Hundar village into the Balti area, the beautiful village of Baigdandu is also located in this area. There is a presence of people with startling blue eyes, auburn hair. Local lore has it that they were a Greek tribe who came in search of Jesus Christs tomb, Baigdandu is also known for the goats that give you the famous Pashmina shawls
25.
Wild Bactrian camel
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The wild Bactrian camel is called havtgai in Mongolian. It is closely related to the domesticated Bactrian camel and they are both large, even-toed ungulates native to the steppes of central Asia, with a double hump. Until recently, wild Bactrian camels were considered to have descended from domesticated Bactrian camels that became feral after escaping from captivity or being returned to the wild. However, a 1. 9% difference in mitochondrial DNA suggests a date of 0.7 to 1.5 million years ago. It is restricted in the wild to remote regions of the Gobi and Taklamakan Deserts of Mongolia, the wool of C. ferus is shorter and sparser than that of domestic animals and its colour is always sandy. And most notably, C. ferus has low, pointed, cone-shaped humps—usually about half the size of those of the camel in fair condition”. It can also survive on water even saltier than seawater – which no other large mammal in the world, including the domestic Bactrian camel, can tolerate. The wild Bactrian camel differs from the domestic Bactrian in a number of ways – smaller, more conical humps, flatter skull and their habitat is in arid plains and hills where water sources are scarce and very little vegetation exists with shrubs as their main food source. Wild Bactrian camels travel over long distances, seeking water in close to mountains where springs are found. The size of a herd may vary up to 100 camels but generally of 2-15 members in a group, the wild Bactrian camels are limited to three pockets in Mongolia and China, about 600 in the Gobi desert in northwest China and 800 in the Mongolian desert. In ancient times, wild Bactrian camels were seen from the bend of the Yellow River extending west to the Southern Mongolia deserts and further to Northwest China. In the 1800s, due to hunting for its meat and hide, its presence was noted in remote areas of the Gobi and Taklimakan deserts in Mongolia, in the 1920s, only remnant populations were recorded in Mongolia and China. The habitats of the wild Bactrian camel have widely varying temperatures and their long, narrow slit-like nostrils and thick eyelashes, and the ears with hairs provide protection against desert sandstorms. They have tough undivided soles with two large toes that spread apart, and a horny layer which enables them to walk on rough. Their body hair, thick and shaggy, changes colour to brown or beige during winter. The legend that camels storing water in their stomachs is a misconception, like its close relative, the domesticated Bactrian camel, it is one of the few mammals able to eat snow to provide itself with liquids in the winter. Wild Bactrian camels generally move in groups of up to 30 individuals and they are fully migratory and widely scattered with a population density as low as 5 per 100 km2. They travel with an adult male in the lead and assemble near water points where larger groups can also be seen
26.
Lamini
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Lamini is a tribe of the subfamily Camelinae. It contains two extant genera with four species, all exclusively from South America, llamas, alpacas, vicuñas, the former two are domesticated species, while the latter two are only found in the wild. The four species can interbreed and produce fertile offspring, additionally, there are two extinct genera known from the fossil record. The digestive system of lamoids allows them to digest certain toxins, the alpaca, a domestic camelid, weighs between 50 and 65 kg, while its height at the shoulder is 94–104 cm. It is slightly larger than the vicuña, normally, the alpaca is found in the Andes in Peru and Bolivia, though it also inhabits northern Chile and northwestern Argentina. There are about 3.5 million alpacas in the world, the alpaca is mainly used for its wool. Out of the domestic camelids, the alpaca produces wool with longer and finer fiber than the llama, the guanaco is a wild camelid, standing at 100–120 cm at the shoulder and 150–160 cm at the head. It can weigh up to 140 kilograms and its pelage is longer than that of the vicuña but shorter than that of the alpaca, it is considered to be of excellent quality and has a light brown, reddish, or brown-yellow color. The diameter of its fleeces fibers varies between 16 and 18 micrometers, 90% of the worlds guanacos are in Argentina, distributed from the islands of the Beagle Channel and the southern extremity of the Patagonia to the Puna grassland in northeastern Argentina. Guanacos can also be found in Bolivia, Chile, Paraguay, the llama is the largest of the extant laminoids and weighs 130–150 kilograms with a height of 109–119 cm at the shoulder. Llamas are not a species, rather, they were domesticated by the Peruvians and Bolivians of the highlands. Commercial trade led to the current abundance in Colombia, Ecuador, Peru, Bolivia, Chile, Paraguay. There are bands of llamas in the United States, Europe, Japan, the color and length of the llamas wool is variable, depending on the race. The diameter of llama wools fiber varies between 20 and 80 micrometers, depending on whether the llamas were raised for its wool or as a pack animal, the vicuña is the smallest camelid, with a shoulder height of 75–100 cm and a weight of 40–60 kg. Its coat is mainly beige in color and is said to make the best wool in the world, like rodents, the vicuña has continuously-growing incisors. It lives only in areas of high altitude –3,200 m or greater – in the highlands of Argentina, Bolivia, Chile, Peru, and Ecuador
27.
Alpaca
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An alpaca is a domesticated species of South American camelid. It resembles a small llama in appearance, there are two breeds of alpaca, the Suri alpaca and the Huacaya alpaca. Alpacas are considerably smaller than llamas, and unlike llamas, they were not bred to be beasts of burden, Alpaca fiber is used for making knitted and woven items, similar to wool. These items include blankets, sweaters, hats, gloves, scarves, a variety of textiles and ponchos in South America. The fiber comes in more than 52 natural colors as classified in Peru,12 as classified in Australia and 16 as classified in the United States, in trade, distinctions are made between alpacas and the several styles of mohair and luster. An adult alpaca generally is between 81–99 centimetres in height at the shoulders, alpacas have been domesticated for thousands of years. The Moche people of northern Peru often used images in their art. There are no known wild alpacas, and its closest living relative, the alpaca is larger than the vicuña, but smaller than the other camelid species. Along with camels and llamas, alpacas are classified as camelids, alpacas are too small to be used as pack animals. Instead, they are bred exclusively for their fiber and meat, Alpaca meat was once considered a delicacy by Andean inhabitants. Because of the high price commanded by alpaca on the growing North American alpaca market, in 2014, a company was formed claiming to be the first to export US-derived alpaca products to China. Alpacas and llamas can successfully cross-breed, the resulting offspring are called huarizo, which are valued for their unique fleece and gentle dispositions. Alpacas are social animals that live in family groups consisting of a territorial alpha male, females. Alpacas warn the herd about intruders by making sharp, noisy inhalations that sound like a high-pitched bray, the herd may attack smaller predators with their front feet, and can spit and kick. Their aggression towards members of the family is exploited when alpacas are used as guard llamas for guarding sheep. Not all alpacas spit, but all are capable of doing so, spit is somewhat euphemistic, occasionally the projectile contains only air and a little saliva, although alpacas commonly bring up acidic stomach contents and project it onto their chosen targets. Spitting is mostly reserved for other alpacas, but an alpaca will occasionally spit at a human, for alpacas, spitting results in what is called sour mouth. Sour mouth is characterized by a lower lip and a gaping mouth
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Llama
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The llama is a domesticated South American camelid, widely used as a meat and pack animal by Andean cultures since the Pre-Columbian era. The height of a full-grown, full-size llama is 1.7 to 1.8 m tall at the top of the head, at birth, a baby llama can weigh between 9 and 14 kg. Llamas typically live for 15 to 25 years, with some individuals surviving 30 years or more and they are very social animals and live with other llamas as a herd. The wool produced by a llama is very soft and lanolin-free, llamas are intelligent and can learn simple tasks after a few repetitions. When using a pack, they can carry about 25 to 30% of their weight for 8 to 13 km. The name llama was adopted by European settlers from native Peruvians, llamas appear to have originated from the central plains of North America about 40 million years ago. They migrated to South America about three years ago. By the end of the last ice age, camelids were extinct in North America, lamoids, or llamas, consist of the vicuña, guanaco, Suri alpaca, and Huacaya alpaca, and the domestic llama. Guanacos and vicuñas live in the wild, while alpacas – as well as llamas – exist only as domesticated animals, although early writers compared llamas to sheep, their similarity to the camel was soon recognized. They were included in the genus Camelus along with alpaca in the Systema Naturae of Linnaeus and they were, however, separated by Cuvier in 1800 under the name of lama along with the guanaco. Alpacas and vicuñas are in genus Vicugna, the Tylopoda consist of a single family, the Camelidae, and shares the order Artiodactyla with the Suina, the Tragulina, the Pecora, and the Whippomorpha. Llamas were not always confined to South America, abundant llama-like remains were found in Pleistocene deposits in the Rocky Mountains, some of the fossil llamas were much larger than current forms. Some species remained in North America during the last ice ages, North American llamas are categorized as a single extinct genus, Hemiauchenia. Llama-like animals would have been a common sight 25,000 years ago, in modern-day California, Texas, New Mexico, Utah, Missouri, the camelid lineage has a good fossil record. Camel-like animals have been traced from the thoroughly differentiated, modern species back through early Miocene forms and their characteristics became more general, and they lost those that distinguished them as camelids, hence, they were classified as ancestral artiodactyls. No fossils of these forms have been found in the Old World, indicating that North America was the original home of camelids. The formation of the Isthmus of Panama three million years ago allowed camelids to spread to South America as part of the Great American Interchange, meanwhile, North American camelids died out at the end of the Pleistocene. The following characteristics apply especially to llamas, dentition of adults, -incisors 1/3 canines 1/1, premolars 2/2, molars 3/2, total 32
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Guanaco
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The guanaco, a camelid native to South America, stands between 1.0 and 1.2 m at the shoulder and weighs 90 to 140 kg. Its color varies very little, ranging from a brown to dark cinnamon. Guanacos have grey faces and small, straight ears, the name guanaco comes from the South American Quechua word huanaco. The guanaco is a native to the mountainous regions of South America. They are found in the altiplano of Peru, Bolivia and Chile, in Argentina and Chile, they are more numerous in Patagonian regions, as well as in places such as the Torres del Paine National Park, and Isla Grande de Tierra del Fuego. In these areas, they have more robust populations, since grazing competition from livestock is limited, estimates, as of 2011, place their numbers at 400,000 to 600,000. A small introduced population exists on Staats Island in the Falkland Islands, guanacos live in herds composed of females, their young, and a dominant male. While reproductive groups tend to remain small, often containing no more than 10 adults, when they feel threatened, guanacos alert the herd to flee with a high-pitched, bleating call. The male usually runs behind the herd to defend them and they can run at 56 km per hour, often over steep and rocky terrain. A guanacos typical lifespan is 20 to 25 years, guanacos are one of the largest wild mammal species found in South America. Natural predators include cougars, jaguars, and foxes, the guanaco has thicker skin on its neck, a trait also found in its domestic counterpart, the llama and in its relatives, the wild vicuña and domesticated alpaca. This protects its neck from predator attacks, bolivians use the neck-skin of these animals to make shoes, flattening and pounding the skin to be used for the soles. In Chile, hunting is allowed only in Tierra del Fuego, between 2007 and 2012,13,200 guanacos were legally hunted in Tierra del Fuego. Mating season occurs between November and February, during which males often fight violently to establish dominance and breeding rights, eleven-and-a-half months later, a single chulengo is born. Chulengos are able to immediately after birth. Male chulengos are chased off from the herd by the dominant male around one year of age, although the species is still considered wild, around 300 guanacos are in US zoos and around 200 are registered in private herds. Guanacos are the parent species of the domesticated llama, guanacos are often found at high altitudes, up to 4,000 meters above sea level, except in Patagonia, where the southerly latitude means ice covers the vegetation at these altitudes. For guanacos to survive in the low oxygen levels found at high altitudes
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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
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Camelus
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A camel is an even-toed ungulate within the genus Camelus, bearing distinctive fatty deposits known as humps on its back. Bactrian camels take their name from the historical Bactria region of Central Asia, the term camel is derived via Latin and Greek from Hebrew or Phoenician gāmāl. Most of the camels are dromedaries while Bactrian camels and wild Bactrian camels make up only 6% of the total camel population. Camel may also be used broadly to describe any of the seven camel-like mammals in the family Camelidae. The average life expectancy of a camel is 40 to 50 years, a full-grown adult camel stands 1.85 m at the shoulder and 2.15 m at the hump. Camels can run at up to 65 km/h in short bursts, Bactrian camels weigh 300 to 1,000 kg and dromedaries 300 to 600 kg. For instance, the speed for the one humped camel is about 40 km/hour while the two humped camel has around 27.2 km/hour. The male dromedary camel has in its throat an organ called a dulla and it resembles a long, swollen, pink tongue hanging out of the side of its mouth. Camels mate by having both male and female sitting on the ground, with the male mounting from behind, the male usually ejaculates three or four times within a single mating session. Camelids are the ungulates to mate in a sitting position. Camels do not directly store water in their humps as was commonly believed. In hot and dry environments, within 8 to 10 days only the dromedary camels might consume water which during this period the third of their bodys weight may be reduced due to the dehydration. When this tissue is metabolized, it more than one gram of water for every gram of fat processed. This fat metabolization, while releasing energy, causes water to evaporate from the lungs during respiration, overall, Camels have a series of physiological adaptations that allow them to withstand long periods of time without any external source of water. Unlike other mammals, their red cells are oval rather than circular in shape. Camels are able to withstand changes in temperature and water consumption that would kill most other animals. Their temperature ranges from 34 °C at dawn and steadily increases to 40 °C by sunset, in general, to compare between camels and the other livestock, camels lose only 1. Camels rarely sweat, even when ambient temperatures reach 49 °C, any sweat that does occur evaporates at the skin level rather than at the surface of their coat, the heat of vaporization therefore comes from body heat rather than ambient heat
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Camelidae
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Camelids are members of the biological family Camelidae, the only currently living family in the suborder Tylopoda. The extant members of group are, dromedary camels, Bactrian camels, wild Bactrian camels, llamas, alpacas, vicuñas. Camelids are even-toed ungulates classified in the order Cetartiodactyla, along with pigs, hippopotamuses, whales, deer, giraffes, cattle, goats, antelope, Camelids are large, strictly herbivorous animals with slender necks and long legs. They differ from ruminants in a number of ways and their dentition show traces of vestigial central incisors in the upper jaw, and the third incisors have developed into canine-like tusks. Camelids also have canine teeth and tusk-like premolars, which are separated from the molars by a gap. Because of this, camelids have to lie down by resting on their knees with their legs tucked underneath their bodies and they also have a unique type of antibodies which lack the light chain, in addition to the normal antibodies found in other mammals. These so-called heavy-chain antibodies are being used to develop single-domain antibodies with potential pharmaceutical applications, Camelids do not have hooves, rather they have two-toed feet with toenails and soft foot pads. Most of the weight of the animal rests on these tough, the South American camelids, adapted to steep and rocky terrain, can move the pads on their toes to maintain grip. Many fossil camelids were unguligrade and probably hooved, in contrast to all living species, Camelids are behaviorally similar in many ways, including their walking gait, in which both legs on the same side are moved simultaneously. Consequently, camelids large enough for human beings to ride have a typical swaying motion, dromedary camels, bactrian camels, llamas and alpacas are all induced ovulators. The three Afro-Asian camel species have developed adaptations to their lives in harsh, near-waterless environments. Wild populations of the Bactrian camel are even able to drink brackish water, comparative table of the seven extant species in the family Camelidae, Camelids are unusual in that their modern distribution is almost the inverse of their area of origin. Camelids first appeared early in the evolution of the even-toed ungulates, around 45 million years ago during the middle Eocene. Among the earliest camelids was the rabbit-sized Protylopus, which still had four toes on each foot, by the late Eocene, around 35 million years ago, camelids such as Poebrotherium had lost the two lateral toes, and were about the size of a modern goat. The family diversified and prospered, but remained confined to the North American continent until only two or three million years ago, when representatives arrived in Asia, and South America. A high arctic camel from this period has been documented in the far northern reaches of Canada. Fossil camelids show a wider variety than their modern counterparts, one North American genus, Titanotylopus, stood 3.5 m at the shoulder, compared with the about 2 m of the largest modern camelids. Other extinct camelids included small, gazelle-like animals, such as Stenomylus, finally, a number of very tall, giraffe-like camelids were adapted to feeding on leaves from high trees, including such genera as Aepycamelus, and Oxydactylus
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Ancient Greece
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Ancient Greece was a civilization belonging to a period of Greek history from the Greek Dark Ages of the 12th-9th centuries BC to the end of antiquity. Immediately following this period was the beginning of the Early Middle Ages and this was followed by the period of Classical Greece, an era that began with the Greco-Persian Wars, lasting from the 5th to 4th centuries BC. Due to the conquests by Alexander the Great of Macedonia, Hellenistic civilization flourished from Central Asia to the end of the Mediterranean Sea. Classical Greek culture, especially philosophy, had a influence on ancient Rome. For this reason Classical Greece is generally considered to be the culture which provided the foundation of modern Western culture and is considered the cradle of Western civilization. Classical Antiquity in the Mediterranean region is considered to have begun in the 8th century BC. Classical Antiquity in Greece is preceded by the Greek Dark Ages and this period is succeeded, around the 8th century BC, by the Orientalizing Period during which a strong influence of Syro-Hittite, Jewish, Assyrian, Phoenician and Egyptian cultures becomes apparent. The end of the Dark Ages is also dated to 776 BC. The Archaic period gives way to the Classical period around 500 BC, Ancient Periods Astronomical year numbering Dates are approximate, consult particular article for details The history of Greece during Classical Antiquity may be subdivided into five major periods. The earliest of these is the Archaic period, in which artists made larger free-standing sculptures in stiff, the Archaic period is often taken to end with the overthrow of the last tyrant of Athens and the start of Athenian Democracy in 508 BC. It was followed by the Classical period, characterized by a style which was considered by observers to be exemplary, i. e. classical, as shown in the Parthenon. This period saw the Greco-Persian Wars and the Rise of Macedon, following the Classical period was the Hellenistic period, during which Greek culture and power expanded into the Near and Middle East. This period begins with the death of Alexander and ends with the Roman conquest, Herodotus is widely known as the father of history, his Histories are eponymous of the entire field. Herodotus was succeeded by authors such as Thucydides, Xenophon, Demosthenes, Plato, most of these authors were either Athenian or pro-Athenian, which is why far more is known about the history and politics of Athens than those of many other cities. Their scope is limited by a focus on political, military and diplomatic history, ignoring economic. In the 8th century BC, Greece began to emerge from the Dark Ages which followed the fall of the Mycenaean civilization, literacy had been lost and Mycenaean script forgotten, but the Greeks adopted the Phoenician alphabet, modifying it to create the Greek alphabet. The Lelantine War is the earliest documented war of the ancient Greek period and it was fought between the important poleis of Chalcis and Eretria over the fertile Lelantine plain of Euboea. Both cities seem to have suffered a decline as result of the long war, a mercantile class arose in the first half of the 7th century BC, shown by the introduction of coinage in about 680 BC
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Aristotle
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Aristotle was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidice, on the northern periphery of Classical Greece. His father, Nicomachus, died when Aristotle was a child, at seventeen or eighteen years of age, he joined Platos Academy in Athens and remained there until the age of thirty-seven. Shortly after Plato died, Aristotle left Athens and, at the request of Philip II of Macedon, teaching Alexander the Great gave Aristotle many opportunities and an abundance of supplies. He established a library in the Lyceum which aided in the production of many of his hundreds of books and he believed all peoples concepts and all of their knowledge was ultimately based on perception. Aristotles views on natural sciences represent the groundwork underlying many of his works, Aristotles views on physical science profoundly shaped medieval scholarship. Their influence extended from Late Antiquity and the Early Middle Ages into the Renaissance, some of Aristotles zoological observations, such as on the hectocotyl arm of the octopus, were not confirmed or refuted until the 19th century. His works contain the earliest known study of logic, which was incorporated in the late 19th century into modern formal logic. Aristotle was well known among medieval Muslim intellectuals and revered as The First Teacher and his ethics, though always influential, gained renewed interest with the modern advent of virtue ethics. All aspects of Aristotles philosophy continue to be the object of academic study today. Though Aristotle wrote many elegant treatises and dialogues – Cicero described his style as a river of gold – it is thought that only around a third of his original output has survived. Aristotle, whose means the best purpose, was born in 384 BC in Stagira, Chalcidice. His father Nicomachus was the physician to King Amyntas of Macedon. Aristotle was orphaned at a young age, although there is little information on Aristotles childhood, he probably spent some time within the Macedonian palace, making his first connections with the Macedonian monarchy. At the age of seventeen or eighteen, Aristotle moved to Athens to continue his education at Platos Academy and he remained there for nearly twenty years before leaving Athens in 348/47 BC. Aristotle then accompanied Xenocrates to the court of his friend Hermias of Atarneus in Asia Minor, there, he traveled with Theophrastus to the island of Lesbos, where together they researched the botany and zoology of the island. Aristotle married Pythias, either Hermiass adoptive daughter or niece and she bore him a daughter, whom they also named Pythias. Soon after Hermias death, Aristotle was invited by Philip II of Macedon to become the tutor to his son Alexander in 343 BC, Aristotle was appointed as the head of the royal academy of Macedon. During that time he gave not only to Alexander
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Species description
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A species description is a formal description of a newly discovered species, usually in the form of a scientific paper. Its purpose is to give a description of a new species of organism and explain how it differs from species which have been described previously. The species description often contains photographs or other illustrations of the type material, the publication in which the species is described gives the new species a formal scientific name. Today, some 1.9 million species have been described and named and it is customary for scientists to introduce all relevant new findings and research in a scientific manuscript, which is sent to other scientists for peer review. If accepted, it is published in a journal of the appropriate discipline or in a book. Descriptions and naming of a new species or other taxa follow the same process, a name of a new species becomes valid with the date of publication of its formal scientific description. A scientific species description must fulfill several formal criteria specified by the nomenclature codes, Species names are written in the 26 letters of the Latin alphabet, but many species names are based on words from other languages, Latinized. Once the manuscript has been accepted for publication, the new name is officially created. Once a species name has been assigned and approved, it can not be changed except in the case of error. For example, a species of beetle was named by a German collector after Adolf Hitler in 1933 when he had become chancellor of Germany. It is not clear whether such a dedication would be considered acceptable or appropriate today, Species names have been chosen on many different bases. Most common is a naming for the external appearance, its origin. Examples would include a bat species named for the two stripes on its back, a named for its Bolivian origin, and an ant species dedicated to the actor Harrison Ford. A scientific name in honor of a person or persons is a known as a taxonomic patronym or patronymic, a number of humorous species names also exist. Literary examples include the genus name Borogovia, which is named after the borogove, a second example, Macrocarpaea apparata was named after the magical spell to apparate from the Harry Potter novels by J. K. Rowling, as it seemed to appear out of nowhere. For example, the genus Victoria was named in honour of Queen Victoria of Great Britain, more recently, a species of lemur was named after the actor John Cleese in recognition of his work to publicize the plight of lemurs in Madagascar. Non-profit ecological organizations may also allow benefactors to name new species in exchange for support for taxonomic research. A German non-profit organisation, BIOPAT - Patrons for Biodiversity has raised more than $450,000 for research, the International Code of Nomenclature for algae, fungi, and plants discourages this practice somewhat, Recommendation 20A
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History of Animals
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History of Animals is one of the major texts on biology by the ancient Greek philosopher Aristotle, who had studied at Platos Academy in Athens. It was written in the fourth century BC, Aristotle died in 322 BC, generally seen as a pioneering work of zoology, Aristotle frames his text by explaining that he is investigating the what prior to establishing the why. The book is thus an attempt to apply philosophy to part of the natural world, throughout the work, Aristotle seeks to identify differences, both between individuals and between groups. A group is established when it is seen all members have the same set of distinguishing features, for example, that all birds have feathers, wings. This relationship between the birds and their features is recognized as a universal, some of these were long considered fanciful before being rediscovered in the nineteenth century. Aristotle has been accused of making errors, but some are due to misinterpretation of his text and he did however make somewhat uncritical use of evidence from other people, such as travellers and beekeepers. The History of Animals had a influence on zoology for some two thousand years. It continued to be a source of knowledge until in the sixteenth century zoologists including Conrad Gessner, all influenced by Aristotle. Aristotle studied at Platos Academy in Athens, remaining there for some 17 years and this study made him the earliest natural historian whose written work survives. No similarly detailed work on zoology was attempted until the sixteenth century and his writings on zoology form about a quarter of his surviving work. Aristotles pupil Theophrastus later wrote a book on botany, Enquiry into Plants. In the History of Animals, Aristotle sets out to investigate the existing facts, the book is thus a defence of his method of investigating zoology. Aristotle investigates four types of differences between animals, differences in body parts, differences in ways of life and types of activity. On the other hand, some animals that have red blood have lungs, here one can rightly conclude that if something has lungs, it has red blood, but Aristotle is careful not to imply that all red-blooded animals have lungs, so the reasoning here is not bidirectional. Book I The grouping of animals and the parts of the human body. Aristotle describes the parts that the body is made of, such as the skull, brain, face, eyes, ears, nose, tongue, thorax, belly, heart, viscera, genitalia. Book II The different parts of red-blooded animals, Book III The internal organs, including generative system, veins, sinews, bone etc. He moves on to the blood, bone marrow, milk including rennet and cheese, Book IV Animals without blood – cephalopods, crustaceans, etc
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Chinese Academy of Sciences
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The Chinese Academy of Sciences, with historical origins in the Academia Sinica during the Republic of China era, is the national academy for the natural sciences of the Peoples Republic of China. It is headquartered in Beijing, with branch institutes all over mainland China and it has also created hundreds of commercial enterprises, with Lenovo being one of the most famous. The Academy has around 68,000 employees and includes 104 institutions, the Chinese Academy has its roots from Academia Sinica, founded in 1928 by the Guomindang Nationalist Government. After the Communist Party took control of mainland China, Academia Sinica was renamed Chinese Academy of Sciences and it has over one hundred institutes and two universities. These CAS branches and offices are located in 20 provinces and municipalities throughout China, CAS has invested in or created over 430 science- and technology-based enterprises in eleven industries including eight companies listed on stock exchanges. Being granted a Fellowship of the Academy represents the highest level of honor for Chinese scientists. The CAS membership system includes Academicians, Emeritus Academician and Foreign Academicians, the Ministry of Science and Technology had at the same time also initiated measures to address misconduct in state-funded programs. Together with the National Natural Science Foundation of China, the academy publishes the academic journal
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Phylogenetics
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In biology, phylogenetics /ˌfaɪloʊdʒəˈnɛtɪks, -lə-/ is the study of the evolutionary history and relationships among individuals or groups of organisms. These relationships are discovered through phylogenetic inference methods that evaluate observed heritable traits, the result of these analyses is a phylogeny – a diagrammatic hypothesis about the history of the evolutionary relationships of a group of organisms. The tips of a tree can be living organisms or fossils. Phylogenetic analyses have become central to understanding biodiversity, evolution, ecology, taxonomy is the classification, identification and naming of organisms. It is usually richly informed by phylogenetics, but remains a methodologically and logically distinct discipline, usual methods of phylogenetic inference involve computational approaches implementing the optimality criteria and methods of parsimony, maximum likelihood, and MCMC-based Bayesian inference. All these depend upon an implicit or explicit mathematical model describing the evolution of characters observed, prior to 1990, phylogenetic inferences were generally presented as narrative scenarios. Such methods are often ambiguous and lack explicit criteria for evaluating alternative hypotheses, the term phylogeny derives from the German Phylogenie, introduced by Haeckel in 1866, and the Darwinian approach to classification became known as the phyletic approach. During the late 19th century, Ernst Haeckels recapitulation theory, or biogenetic fundamental law, was widely accepted, but this theory has long been rejected. O. See, Huerta-Cepas, Jaime, Dopazo, Joaquín, Gabaldón, ETE, A python Environment for Tree Exploration. PhylomeDB, A public database hosting thousands of gene phylogenies ranging many different species, See, Huerta-Cepas, J. Capella-Gutierrez, S. Pryszcz, L. P. Denisov, I. Kormes, D. Marcet-Houben, M. Gabaldón, T. PhylomeDB v3.0, An expanding repository of genome-wide collections of trees, alignments, lents, N. H. Cifuentes, O. E. Carpi, A. Teaching the Process of Molecular Phylogeny and Systematics, A Multi-Part Inquiry-Based Exercise
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Tribe (biology)
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In biology, a tribe is a taxonomic rank above genus, but below family and subfamily. It is sometimes subdivided into subtribes, in zoology, some examples include the tribes Caprini, Hominini, Bombini, and Thunnini. The standard ending for the name of a tribe is -ini. The tribe Hominini is divided into subtribes by some scientists, subtribe Hominina then comprises humans, the standard ending for the name of a zoological subtribe is -ina. In botany, examples include the tribes Acalypheae and Hyacintheae, the standard ending for the name of a botanical tribe is -eae. The tribe Hyacintheae is divided into subtribes, including the subtribe Massoniinae, the standard ending for the name of a botanical subtribe is -inae. In bacteriology, the form of names is as in botany, e. g. Pseudomonadeae
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Subspecies
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In biological classification, subspecies is either a taxonomic rank subordinate to species, or a taxonomic unit in that rank. A subspecies cannot be recognized independently, a species will either be recognized as having no subspecies at all or at least two, in zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, in bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides whether to recognize a subspecies or not, the differences between subspecies are usually less distinct than the differences between species. In zoology, the International Code of Zoological Nomenclature accepts only one rank below that of species, other groupings, infrasubspecific entities do not have names regulated by the ICZN. Such forms have no official ICZN status, though they may be useful in describing altitudinal or geographical clines, pet breeds, transgenic animals, etc. While the scientific name of a species is a binomen, the name of a subspecies is a trinomen - a binomen followed by a subspecific name. A tigers binomen is Panthera tigris, so for a Sumatran tiger the trinomen is, for example, names published before 1992 in the rank of variety are taken to be names of subspecies. In botany, subspecies is one of many ranks below that of species, such as variety, subvariety, form, the subspecific name is preceded by subsp. or ssp. as Schoenoplectus californicus ssp. tatora. A botanical name consists of at most three parts, an infraspecific name includes the species binomial, and one infraspecific epithet, such as subspecies or variety. For example, Motacilla alba alba is the subspecies of the white wagtail. The subspecies name that repeats the name is referred to in botanical nomenclature as the subspecies autonym. When zoologists disagree over whether a population is a subspecies or a full species. A subspecies is a rank below species – the only recognized rank in the zoological code. Botanists and mycologists have the choice of ranks lower than subspecies, such as variety or form, in biological terms, rather than in relation to nomenclature, a polytypic species has two or more subspecies, races, or more generally speaking, populations that need a separate description. These are separate groups that are distinct from one another and do not generally interbreed. These subspecies, races, or populations, can be named as subspecies by zoologists, a monotypic species has no distinct population or races, or rather one race comprising the whole species. A taxonomist would not name a subspecies within such a species, monotypic species can occur in several ways, All members of the species are very similar and cannot be sensibly divided into biologically significant subcategories
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Genetic divergence
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The genetic differences among divergent populations can involve silent mutations or give rise to significant morphological and/or physiological changes. Genetic divergence will always accompany reproductive isolation, either due to novel adaptations via selection and/or due to genetic drift, on a molecular genetics level, genetic divergence is due to changes in a small number of genes in a species, resulting in speciation. Consequently, they could not reproduce and pass the mutation on to further generations, hence, it is more likely that divergence, and subsequently reproductive isolation, are the outcome of multiple small mutations over evolutionary time
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Miocene
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The Miocene is the first geological epoch of the Neogene Period and extends from about 23.03 to 5.333 million years ago. The Miocene was named by Sir Charles Lyell and its name comes from the Greek words μείων and καινός and means less recent because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene Epoch and is followed by the Pliocene Epoch, the earth went from the Oligocene through the Miocene and into the Pliocene, with the climate slowly cooling towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event, the apes arose and diversified during the Miocene, becoming widespread in the Old World. By the end of this epoch, the ancestors of humans had split away from the ancestors of the chimpanzees to follow their own evolutionary path, as in the Oligocene before it, grasslands continued to expand and forests to dwindle in extent. In the Miocene seas, kelp forests made their first appearance, the plants and animals of the Miocene were fairly modern. The Miocene faunal stages from youngest to oldest are typically named according to the International Commission on Stratigraphy, Two subdivisions each form the lower, middle, continents continued to drift toward their present positions. Mountain building took place in western North America, Europe, both continental and marine Miocene deposits are common worldwide with marine outcrops common near modern shorelines. Well studied continental exposures occur in the North American Great Plains, India continued to collide with Asia, creating dramatic new mountain ranges. The Tethys Seaway continued to shrink and then disappeared as Africa collided with Eurasia in the Turkish–Arabian region between 19 and 12 Ma. The subsequent uplift of mountains in the western Mediterranean region and a fall in sea levels combined to cause a temporary drying up of the Mediterranean Sea near the end of the Miocene. The global trend was towards increasing aridity caused primarily by global cooling reducing the ability of the atmosphere to absorb moisture, climates remained moderately warm, although the slow global cooling that eventually led to the Pleistocene glaciations continued. Although a long-term cooling trend was well underway, there is evidence of a period during the Miocene when the global climate rivalled that of the Oligocene. The Miocene warming began 21 million years ago and continued until 14 million years ago, by 8 million years ago, temperatures dropped sharply once again, and the Antarctic ice sheet was already approaching its present-day size and thickness. Greenland may have begun to have large glaciers as early as 7 to 8 million years ago, life during the Miocene Epoch was mostly supported by the two newly formed biomes, kelp forests and grasslands. This allows for more grazers, such as horses, rhinoceroses, ninety five percent of modern plants existed by the end of this epoch. The higher organic content and water retention of the deeper and richer grassland soils, with long term burial of carbon in sediments, produced a carbon and this, combined with higher surface albedo and lower evapotranspiration of grassland, contributed to a cooler, drier climate. The expansion of grasslands and radiations among terrestrial herbivores correlates to fluctuations in CO2
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Speciation
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Speciation is the evolutionary process by which biological populations evolve to become distinct species. The biologist Orator F. Cook coined the term speciation in 1906 for the splitting of lineages or cladogenesis, Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book The Origin of Species. He also identified sexual selection as a mechanism, but found it problematic. There are four modes of speciation in nature, based on the extent to which speciating populations are isolated from one another, allopatric, peripatric, parapatric. Speciation may also be induced artificially, through animal husbandry, agriculture, whether genetic drift is a minor or major contributor to speciation is the subject matter of much ongoing discussion. All forms of speciation have taken place over the course of evolution, however. During allopatric speciation, a population splits into two isolated populations. When the populations come back into contact, they have evolved such that they are isolated and are no longer capable of exchanging genes. Island genetics is the associated with the tendency of small. Examples include insular dwarfism and the changes among certain famous island chains. The Galápagos Islands are particularly famous for their influence on Charles Darwin, though the finches were less important for Darwin, more recent research has shown the birds now known as Darwins finches to be a classic case of adaptive evolutionary radiation. In peripatric speciation, a subform of allopatric speciation, new species are formed in isolated and it is related to the concept of a founder effect, since small populations often undergo bottlenecks. Genetic drift is often proposed to play a significant role in peripatric speciation, parapatric speciation may be associated with differential landscape-dependent selection. Even if there is a gene flow between two populations, strong differential selection may impede assimilation and different species may eventually develop, habitat differences may be more important in the development of reproductive isolation than the isolation time. Ecologists refer to parapatric and peripatric speciation in terms of ecological niches, a niche must be available in order for a new species to be successful. Ring species such as Larus gulls have been claimed to illustrate speciation in progress, the grass Anthoxanthum odoratum may be starting parapatric speciation in areas of mine contamination. Sympatric speciation refers to the formation of two or more descendant species from an ancestral species all occupying the same geographic location. Often-cited examples of sympatric speciation are found in insects that become dependent on different host plants in the same area, however, the existence of sympatric speciation as a mechanism of speciation remains highly debated
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Pleistocene
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The Pleistocene is the geological epoch which lasted from about 2,588,000 to 11,700 years ago, spanning the worlds most recent period of repeated glaciations. The end of the Pleistocene corresponds with the end of the last glacial period, the Pleistocene is the first epoch of the Quaternary Period or sixth epoch of the Cenozoic Era. In the ICS timescale, the Pleistocene is divided into four stages or ages, all of these stages were defined in southern Europe. In addition to this subdivision, various regional subdivisions are often used. Charles Lyell introduced the term pleistocene in 1839 to describe strata in Sicily that had at least 70% of their molluscan fauna still living today and this distinguished it from the older Pliocene Epoch, which Lyell had originally thought to be the youngest fossil rock layer. The Pleistocene has been dated from 2.588 million to 11,700 years before present and it covers most of the latest period of repeated glaciation, up to and including the Younger Dryas cold spell. The end of the Younger Dryas has been dated to about 9640 BC, the IUGS has yet to approve a type section, Global Boundary Stratotype Section and Point, for the upper Pleistocene/Holocene boundary. The proposed section is the North Greenland Ice Core Project ice core 75°06 N 42°18 W, the lower boundary of the Pleistocene Series is formally defined magnetostratigraphically as the base of the Matuyama chronozone, isotopic stage 103. Above this point there are notable extinctions of the calcareous nanofossils, Discoaster pentaradiatus, the Pleistocene covers the recent period of repeated glaciations. The name Plio-Pleistocene has, in the past, been used to mean the last ice age. The revised definition of the Quaternary, by pushing back the date of the Pleistocene to 2.58 Ma. Pleistocene climate was marked by repeated glacial cycles in which continental glaciers pushed to the 40th parallel in some places and it is estimated that, at maximum glacial extent, 30% of the Earths surface was covered by ice. In addition, a zone of permafrost stretched southward from the edge of the sheet, a few hundred kilometres in North America. The mean annual temperature at the edge of the ice was −6 °C, during interglacial times, such as at present, drowned coastlines were common, mitigated by isostatic or other emergent motion of some regions. The effects of glaciation were global, antarctica was ice-bound throughout the Pleistocene as well as the preceding Pliocene. The Andes were covered in the south by the Patagonian ice cap, there were glaciers in New Zealand and Tasmania. The current decaying glaciers of Mount Kenya, Mount Kilimanjaro, glaciers existed in the mountains of Ethiopia and to the west in the Atlas mountains. In the northern hemisphere, many glaciers fused into one, the Cordilleran ice sheet covered the North American northwest, the east was covered by the Laurentide
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Fertility
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Fertility is the natural capability to produce offspring. As a measure, fertility rate is the number of offspring born per mating pair, Fertility differs from fecundity, which is defined as the potential for reproduction. A lack of fertility is infertility while a lack of fecundity would be called sterility, Human fertility depends on factors of nutrition, sexual behavior, consanguinity, culture, instinct, endocrinology, timing, economics, way of life, and emotions. In demographic contexts, fertility refers to the production of offspring. While fertility can be measured, fecundity cannot be, demographers measure the fertility rate in a variety of ways, which can be broadly broken into period measures and cohort measures. Period measures refer to a cross-section of the population in one year, cohort data on the other hand, follows the same people over a period of decades. Both period and cohort measures are widely used, crude birth rate - the number of live births in a given year per 1,000 people alive at the middle of that year. One disadvantage of this indicator is that it is influenced by the age structure of the population, general fertility rate - the number of births in a year divided by the number of women aged 15–44, times 1000. It focuses on the potential mothers only, and takes the age distribution into account, child-Woman Ratio - the ratio of the number of children under 5 to the number of women 15–49, times 1000. It is especially useful in historical data as it not require counting births. This measure is actually a hybrid, because it involves deaths as well as births, TFR equals the sum for all age groups of 5 times each ASFR rate. Gross Reproduction Rate - the number of girl babies a synthetic cohort will have and it assumes that all of the baby girls will grow up and live to at least age 50. NRR is always lower than GRR, but in countries where mortality is low, almost all the baby girls grow up to be potential mothers. In countries with high mortality, NRR can be as low as 70% of GRR, when NRR =1.0, each generation of 1000 baby girls grows up and gives birth to exactly 1000 girls. When NRR is less one, each generation is smaller than the previous one. When NRR is greater than 1 each generation is larger than the one before, NRR is a measure of the long-term future potential for growth, but it usually is different from the current population growth rate. A parents number of children strongly correlates with the number of children that each person in the generation will eventually have. Factors generally associated with increased fertility include religiosity, intention to have children, Factors generally associated with decreased fertility include wealth, education, female labor participation, urban residence, intelligence, increased female age and increased male age
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Phenotype
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A phenotype is the composite of an organisms observable characteristics or traits, such as its morphology, development, biochemical or physiological properties, behavior, and products of behavior. A phenotype results from the expression of a genetic code, its genotype, as well as the influence of environmental factors. When two or more clearly different phenotypes exist in the population of a species, the species is called polymorphic. A well-documented polymorphism is Labrador Retriever coloring, while the color depends on many genes, it is clearly seen in the environment as yellow, black. This genotype-phenotype distinction was proposed by Wilhelm Johannsen in 1911 to make clear the difference between an organisms heredity and what that heredity produces, the distinction is similar to that proposed by August Weismann, who distinguished between germ plasm and somatic cells. The term phenotype has sometimes incorrectly used as a shorthand for phenotypic difference from wild type. Despite its seemingly straightforward definition, the concept of the phenotype has hidden subtleties and it may seem that anything dependent on the genotype is a phenotype, including molecules such as RNA and proteins. It may seem that this goes beyond the intentions of the concept with its focus on the organism in itself. Either way, the term phenotype includes traits or characteristics that can be visible by some technical procedure. A notable extension to this idea is the presence of molecules or metabolites that are generated by organisms from chemical reactions of enzymes. Another extension adds behavior to the phenotype, since behaviors are also observable characteristics, behavioral phenotypes include cognitive, personality, and behavioral patterns. Some behavioral phenotypes may characterize psychiatric disorders or syndromes, phenotypic variation is a fundamental prerequisite for evolution by natural selection. It is the organism as a whole that contributes to the next generation. Without phenotypic variation, there would be no evolution by natural selection, the plant Hieracium umbellatum is found growing in two different habitats in Sweden. These habitats alternate along the coast of Sweden and the habitat that the seeds of Hieracium umbellatum land in, the concept of phenotype can be extended to variations below the level of the gene that affect an organisms fitness. For example, silent mutations that do not change the amino acid sequence of a gene may change the frequency of guanine-cytosine base pairs. The term extended phenotype refers to the idea that a phenotype is not restricted to biological processes, the concept generalized by Richard Dawkins explains that phenotype includes all the influence a gene has on the environment and other organisms. ”There are three types of extended phenotypes. The first describes an organism using architectural constructions to modify their environment for living, the most common example given by Dawkins is the beaver
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Hybrid (biology)
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In biology, a hybrid, also known as a cross breed, is the result of combining, through sexual reproduction, the qualities of two animals or plants of different breeds, varieties, species or genera. Hybrids are not always intermediate between their parents, but can show heterosis or hybrid vigour, often growing larger or taller than either parent, some act before fertilization, others after it. A few animal species and many plant species, however, are the result of hybrid speciation, doubling the number of chromosomes to create polyploids is important in hybrid speciation, because homoploid hybrids are rarely fertile, the polyploid hybrids are allopolyploids. Human impact on the environment has greatly increased the mixing of species, with introduced species worldwide, the genetic mixing may threaten many species with extinction, while genetic erosion in crop plants may be damaging the gene pools of many species for future breeding. Many commercially useful fruits, flowers, garden herbs and trees have been produced by hybridization, one flower, Oenothera lamarckiana, was central to early genetics research into polyploidy. The term hybrid is derived from Latin hybrida, used for such as of a tame sow and a wild boar, or the child of a freeman. The term came into use in English in the 19th century. Conspicuous hybrids are named with portmanteau words, starting in the 1920s with the breeding of tiger-lion hybrids. The cross between two different homozygous lines produces an F1 hybrid that is heterozygous, having two alleles, one contributed by each parent and typically one is dominant and the other recessive. Typically, the F1 generation is also phenotypically homogeneous, producing offspring that are all similar to each other, double cross hybrids result from the cross between two different F1 hybrids. Three-way cross hybrids result from the cross between an F1 hybrid and an inbred line, triple cross hybrids result from the crossing of two different three-way cross hybrids. Top cross hybrids result from the crossing of a top quality or pure-bred male, population hybrids result from the crossing of plants or animals in a population with those of another population. These include interspecific hybrids or crosses between different breeds. e, from the point of view of genetics, different kinds of hybrid can be distinguished as follows, A genetic hybrid carries two different alleles of the same gene. A structural hybrid results from the fusion of gametes that have differing structure in at least one chromosome, a numerical hybrid results from the fusion of gametes having different haploid numbers of chromosomes. A permanent hybrid results when only the heterozygous genotype occurs, as in Oenothera lamarckiana, from the point of view of taxonomy, hybrids differ according to their parentage, Hybrids between different subspecies are called intra-specific hybrids. Offspring resulting from interspecies mating, are called interspecific hybrids, these result in hybrid speciation. Intergeneric hybrids result from matings between different genera, such as sheep and goats. Interfamilial hybrids such as chickens and guineafowl or pheasants are reliably described but extremely rare
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Mitochondrion
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The mitochondrion is a double membrane-bound organelle found in all eukaryotic organisms. Some cells in multicellular organisms may however lack them. A number of organisms, such as microsporidia, parabasalids. To date, only one eukaryote, Monocercomonoides, is known to have completely lost its mitochondria, the word mitochondrion comes from the Greek μίτος, mitos, thread, and χονδρίον, chondrion, granule or grain-like. Mitochondria generate most of the supply of adenosine triphosphate, used as a source of chemical energy. Mitochondria are commonly between 0.75 and 3 μm in diameter but vary considerably in size and structure, unless specifically stained, they are not visible. Mitochondrial biogenesis is in turn temporally coordinated with these cellular processes, Mitochondria have been implicated in several human diseases, including mitochondrial disorders, cardiac dysfunction, heart failure and autism. The number of mitochondria in a cell can vary widely by organism, tissue, for instance, red blood cells have no mitochondria, whereas liver cells can have more than 2000, The organelle is composed of compartments that carry out specialized functions. These compartments or regions include the outer membrane, the space, the inner membrane. Although most of a cells DNA is contained in the cell nucleus, mitochondrial proteins vary depending on the tissue and the species. In humans,615 distinct types of protein have been identified from cardiac mitochondria, the mitochondrial proteome is thought to be dynamically regulated. The first observations of structures that probably represented mitochondria were published in the 1840s. Richard Altmann, in 1890, established them as cell organelles, the term mitochondria was coined by Carl Benda in 1898. Leonor Michaelis discovered that Janus green can be used as a stain for mitochondria in 1900. Benjamin F. Kingsbury, in 1912, first related them with cell respiration, in 1913, particles from extracts of guinea-pig liver were linked to respiration by Otto Heinrich Warburg, which he called grana. Warburg and Heinrich Otto Wieland, who had postulated a similar particle mechanism. It was not until 1925, when David Keilin discovered cytochromes, in the following years, the mechanism behind cellular respiration was further elaborated, although its link to the mitochondria was not known. The introduction of tissue fractionation by Albert Claude allowed mitochondria to be isolated from other cell fractions, in 1946, he concluded that cytochrome oxidase and other enzymes responsible for the respiratory chain were isolated to the mitchondria
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