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Chapter 20 - Primate Evolution and Human Origins
Australopithecus garhi, could be the fossil of a direct ancestor of man. Evidence found with the fossil suggests feeding on the energy-rich marrow of long bones. View a short video and description of the find.
(The site will open externally in a new window) How do you hear and whence was your ear? One of the many remarkable features of evolution is that it builds upon success. One trend in evolution has been transformation of the multi-boned reptilian jaw into the mechanisms with which we, humans and other mammals, hear. What is the anatomy and physiology of human hearing? What bones are involved? Relate the bones comprising the inner ear mechanism to homologous bones in the reptilian jaw bone as diagrammed in Evolution, 3/e.
(The site will open externally in a new window) During development of a human individual, the anatomy changes in many systems. Evolution, 3/e shows a comparison of the larynx and mechanisms of speech in adult and juvenile humans, in chimpanzees, as how the speech mechanism might have compared in australopithecines. What is the anatomy and physiology of human speech? What parts are involved?
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