BIOLOGY 1M03 Chapter Notes - Chapter 10: Omnivore, Termite, Phylogenetic Tree
5 Apr 2013
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Document Summary
Bipedal locomotion led to major morphological changes in bodies in new savanna and woodland habitats, new kinds of food became available. Caused changes in teeth, jaws, and skulls. Ardipithecus last common ancestor of humans and chimpanzees lived between 7 and 5 mya. Based on fossils of wood and seeds found at site unclear whether ardipithecus is related more closely to humans or to chimpanzees. Sahelanthropus tchadensis fossil consists of a nearly complete cranium, two fragments of lower jaw, and several teeth. Most work on human evolution has focused on east africa and south. Africa, but this specimen comes from the middle of africa: suggests that hominins had a larger range than believed. Geology of site does not allow radiometric or paleomagnetic dating. Oldest hominin cranium: possesses a very surprising mix of anatomical features. Face is relatively flat and massive browridge over eyes.
