BIOLOGY 1M03 Lecture Notes - Eosimias, Cebidae, Shrew
1 Feb 2013
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Document Summary
How humans evolved- chapter 10 from tree shrew to ape. During the permian and early triassic periods, the world"s fauna was dominated by the therapsids, a diverse group of reptiles that possessed traits, warm bloode and covered with hair, that linked them to the mammals that evolved later. At the end of the triassic period, dinosaurs filled all the niches. One therapsid lineage, evolved and diversified to become the first true mammals. With the extinction of the dinosaurs at the beginning of the cenozoic era came the spectacular radiation of the mammals. The world has become much colder and drier in the last 20 million years, and particularly variable in the last 800 000 years, these changes likely altered the course of human evolution. Factor that contributed the the changing of the world is continental drift. Continents slowly wander around the globe, floating on the denser rock that forms the floor of the deep ocean.
