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Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
Vestigial features may take various forms; for example, they may be patterns of behavior, anatomical structures, or biochemical processes. Like most other physical features, however functional, vestigial features in a given species may successively appear, develop, and persist or disappear at various stages within the life cycle of the organism ...
Painting of Bimbache of El Hierro by Leonardo Torriani, 1592 The San are the oldest inhabitants of Southern Africa. Indigenous communities, peoples, and nations are those which have a historical continuity with pre-invasion and pre-colonial societies that developed on their territories, and may consider themselves distinct from other sectors of the societies now prevailing on those territories ...
According to Guinness World Records, Robert Wadlow of the United States (1918–1940) was the tallest person in recorded history, measuring 272 cm (8 ft 11 in) at the time of his death. There are reports about even taller people but most claims are unverified or erroneous. Since antiquity, discoveries have been reported of gigantic human ...
Scholarship varies on the definition of genocide employed when analysing whether events are genocidal in nature. [2] The United Nations Genocide Convention, not always employed, defines genocide as "any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such: killing members of the group; causing serious bodily or ...
For example, neutral human DNA sequences are approximately 1.2% divergent (based on substitutions) from those of their nearest genetic relative, the chimpanzee, 1.6% from gorillas, and 6.6% from baboons. [10] [11] Genetic sequence evidence thus allows inference and quantification of genetic relatedness between humans and other apes.
Atavism is a term in Joseph Schumpeter's explanation of World War I in twentieth-century liberal Europe. He defends the liberal international relations theory that an international society built on commerce will avoid war because of war's destructiveness and comparative cost.
Evolution is the change in the heritable characteristics of biological populations over successive generations. [1] [2] It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations. [3]