By Thomas H. Huxley

Subtitled "A process Six Lectures to operating Men”, at the foundation of Species highlights Thomas H. Huxley’s present for translating advanced medical theories into lucid language for laypeople with out sacrificing accuracy—in this situation, Darwin’s conception of evolution as defined in his beginning of Species, which engendered huge, immense curiosity, feedback, and interest upon booklet.

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The development of language may have been a gradual phenomenon or it could have been the consequence of a more abrupt change in human genes. Changes in the highly conserved FOXP2 gene, which codes for several transcription factors, may have been the last step in the development of modern speech. The products of this gene, 42 Chapter 5. The Tree of Life discovered in 1998 in a family with severe speech impairment, are important for the coordination of facial musculature during speech. The earliest sign of human cultural development was the increased complexity and sophistication of the stone tools and jewelry found in East Africa.

He believed that language develops through conditioning with parents rewarding the correct use of language. This theory was opposed by Chomsky who suggested that babies are born with an innate language-acquisition device. Evolutionary biologists took ideas from Darwin about natural and sexual selection and integrated them into modern explanations of behavior by shifting emphasis away from the level of the species to the level of the individual or the gene. This led to the development of the new fields of sociobiology and behavioral ecology.

The ability to communicate with language may have been a key factor that preceded and prompted the development of modern humans. There is no consensus about the ultimate origin of language. The descended larynx was formerly viewed as a structure unique to humans; however, it has been found in other species. It may have been adapted many years later to expand the variety of sounds produced by modern humans. The price we pay for this anatomical change is the possibility of choking to death, because we cannot simultaneous breathe and swallow.

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