IB35ACS Study Guide

Always beware the tyranny of the present geologic time

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Unformatted text preview: of grassland environments ● ● ● ● ■ reduction in global forest cover ■ North America and Europe separate ○ El Fayum, Egypt: 30- 40 mya this was a lush forest (aegyptopithecus) Miocene: 23.8- 5.3 mya, warmer and cools off, oscillations of temperatures in 6 mya ○ temperature warmer in early part, tropical forest in middle latitudes ○ 17- 16 mya global temperature cools (woodlands, bushlands, and savannahs spread) ○ Africa connected to Eurasia and animals migrated both ways ○ the age of the apes ○ middle of Miocene: climate shift- apes diversity narrows, monkey diversity increases (20 mya- present) ○ by the end of this epoch, the ancestors of humans had split away from the ancestors of the chimpanzees to follow their own evolutionary path Africa: Proconsul ○ mixture of Old World monkey and ape characteristics, before split of apes and Old World monkeys ○ lack of tail like apes Hominid (i.e Hominidae): A taxonomic Family represents a group of genera that have a similar type of adaptive regime. The hominids represent large bipedal apes with an emphasis on pair bonding. ○ What does “genus” represent within the Hominidae? ■ A genus represents a group of species within a Family that exploit more specific grades within that adaptive regime. ○ Hominidae: all members of the human family tree since split with chimps Terms to keep in mind ○ sexual dimorphism: phenotypic difference between males and females of the same species. Ex: differ...
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This document was uploaded on 03/11/2014 for the course IB 35AC at Berkeley.

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