Group selection

Group selection is a proposed mechanism of evolution in which natural selection is imagined to act at the level of the group, instead of at the more conventional level of the individual. Early authors such as V. C. Wynne-Edwards and Konrad Lorenz argued that the behavior of animals could affect their survival and reproduction as […]

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Mitochondrial Eve

Allan Charles Wilson (18 October 1934 – 21 July 1991) was a Professor of Biochemistry at the University of California, Berkeley, a pioneer in the use of molecular approaches to understand evolutionary change and reconstruct phylogenies, and a revolutionary contributor to the study of human evolution. He was one of the most controversial figures in […]

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the Myth of Race

Uploaded on Jan 31, 2008 One of the leading authorities on race and science, Troy Duster discusses how the understanding of race is being reshaped by the genomics revolution. Sometimes unintentionally and sometimes not so innocently, genomics may be generating a new and more sophisticated racism, not so different from the eugenics-based and criminological racism […]

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Dunbar’s number

Dunbar’s number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individualknows who each person is and how each person relates to every other person.[1][2][3][4][5][6] This number was first proposed in the 1990s by British anthropologist Robin Dunbar, who found […]

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Punctuated equilibrium

Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which proposes that once species appear in the fossil record they will become stable, showing little net evolutionary change for most of their geological history. This state is calledstasis. When significant evolutionary change occurs, the theory proposes that it is generally restricted to […]

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Evolution

Microevolution happens on a small scale (within a single population), while macroevolution happens on a scale that transcends the boundaries of a single species. Despite their differences, evolution at both of these levels relies on the same, established mechanisms of evolutionary change: mutation migration genetic drift natural selection In molecular biology and genetics, a transcription […]

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Chimpanzee Genome Project

The Chimpanzee Genome Project is an effort to determine the DNA sequence of the Chimpanzee genome. It is expected that by comparing the genomes of humans and other apes, it will be possible to better understand what makes humans distinct from other species from a genetic perspective. Human and chimpanzee chromosomes are very similar. The […]

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Metabolism

Metabolism (from Greek: μεταβολή metabolē, “change”) is the set of life-sustaining chemical transformations within the cells of living organisms. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to all chemical reactions that occur in living organisms, including digestionand the transport of […]

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Phylogenetics

Phylogenetics /ˌfaɪloʊdʒəˈnɛtɪks, –lə–/[1][2] (Greek: φυλή, φῦλον – phylé, phylon = tribe, clan, race + γενετικός – genetikós = origin, source, birth)[3] – in biology – is the study of the evolutionary history and relationships among individuals or groups of organisms(e.g. species, or populations). These relationships are discovered through phylogenetic inference methods that evaluate observedheritable traits, […]

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