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Southern and eastern african sites dating to mya show habitats indicating

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Metrics details. Squeaker catfishes Pisces, Mochokidae, Synodontis are widely distributed throughout Africa and inhabit a biogeographic range similar to that of the exceptionally diverse cichlid fishes, including the three East African Great Lakes and their surrounding rivers. Since squeaker catfishes also prefer the same types of habitats as many of the cichlid species, we hypothesized that the East African Synodontis species provide an excellent model group for comparative evolutionary and phylogeographic analyses. The six lineages show a clear geographic patterning. Two lineages are endemic to Lake Tanganyika plus one non-endemic representative , and these are the only two Synodontis lineages that diversified further into a small array of species. One of these species is the cuckoo catfish S.
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About the Animals: Camels

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Understanding the genetic basis of adaption is a central task in biology. Populations of the honey bee Apis mellifera that inhabit the mountain forests of East Africa differ in behavior and morphology from those inhabiting the surrounding lowland savannahs, which likely reflects adaptation to these habitats. We performed whole genome sequencing on 39 samples of highland and lowland bees from two pairs of populations to determine their evolutionary affinities and identify the genetic basis of these putative adaptations. We find that in general, levels of genetic differentiation between highland and lowland populations are very low, consistent with them being a single panmictic population. However, we identify two loci on chromosomes 7 and 9, each several hundred kilobases in length, which exhibit near fixation for different haplotypes between highland and lowland populations.
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They started off the size of a beagle, but with much longer legs and neck, and had no humps or bumps. They first appeared in subtropical forests in North America, during the Eocene Epoch. From there, early camels traveled long journeys, with growing bodies and changing feet, until they became two distinct evolutionary lines. Some migrated over the Isthmus of Panama to South America and evolved into modern day llamas, vicunas, alpacas, and guanacos.
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Human evolution is the evolutionary process that led to the emergence of anatomically modern humans , beginning with the evolutionary history of primates —in particular genus Homo —and leading to the emergence of Homo sapiens as a distinct species of the hominid family, which includes the great apes. This process involved the gradual development of traits such as human bipedalism and language , [1] as well as interbreeding with other hominins , which indicate that human evolution was not linear but a web. The study of human evolution involves several scientific disciplines, including physical anthropology , primatology , archaeology , paleontology , neurobiology , ethology , linguistics , evolutionary psychology , embryology and genetics. Human evolution from its first separation from the last common ancestor of humans and chimpanzees is characterized by a number of morphological , developmental , physiological , and behavioral changes. The most significant of these adaptations are bipedalism, increased brain size, lengthened ontogeny gestation and infancy , and decreased sexual dimorphism.
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