Chapter 10 How Humans Evolved

Chapter 10 How Humans Evolved - Chapter 10: From Tree Shrew...

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Chapter 10: From Tree Shrew to Ape Timescale: o Precambrian o Paleozoic Cambrian Ordovician Silurian Devonian Carboniferous Permian o Mesozoic Triassic Jurassic Cretaceous o Cenozoic Tertiary Quaternary Continental Drift and Climate Change o Scenery changes with evolution o Evolution produces adaptation to changing environmental  conditions; what is adaptive in one environment is not adaptive in  another o If environment was same, evolution of humans would be steady  and have a single direction (a fixed goal) o If environment varies, evolution tracks a moving target (changes in  adaptations are due to changing environment) o Change in the world: Continental drift: movement of continents relative to each  other and poles 225 mya (TRIASSIC) : Pangaea: single, huge  landmass 135 mya (JURASSIC/CRETACEOUS) : Laurasia  (northern half; North America, Eurasia - India) and  Gondwanaland (southern half; the rest) 65 mya (TERTIARY, PALEOCENE; dinosaur  extinction) : Gondwanaland broke up into Africa,  India, South America, Antarctica, Australia 5 mya (TERTIARY, PLIOCENE) : South America joins  North America Importance of continental drift:  Oceans are barriers (isolate certain species from one  another) Size and orientation is one of the engines of climate  change   influencer - 1 -
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Chapter 10 How Humans Evolved - Chapter 10: From Tree Shrew...

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