Human Evolution - Human Evolution 220 MYA Mammals had...

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Human Evolution 220 MYA Mammals had origins around the same time as Dinosaurs 65 MYA Cretaceous extinction killed off dinosaurs and changed the climate - Order of Primates arose 60 MYA origin of primates Front facing eyes Tree dwelling - “Anthropoid” group includes monkeys and apes (arose about 30-40 MYA) Includes monkeys, apes, and humans Large brain to body ratio Opposable thumbs 1) New world monkeys: - have prehensile tails 2) Old world monkeys: - lack prehensile tails 3) Homonoids: - apes and humans - gorillas and chimps exhibit knuckle walking Humans and Apes diverged in lineage from a common ancestor;7-8 MYA Humans DID NOT evolve from apes Family Hominidae arose in the Rift Valley in Africa - orangutans, gorillas, chimps, humans - originally tree dwellers - climate change: African forests became savannah; hominids came down from trees - evolution of bipedalism freed up the forelimbs for other purposes Human lineage and Chimpanzee lineage diverge about 5 MYA 5 MYA India slams into Asia
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This note was uploaded on 04/29/2008 for the course BIOLOGY 102 taught by Professor Guffey during the Spring '08 term at University of Tennessee.

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Human Evolution - Human Evolution 220 MYA Mammals had...

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