10_from_tree_shrew_to_ape

10_from_tree_shrew_to_ape - How How Humans Evolved Chapter...

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How H Evolve Chapter 10: From Tree S Humans ed Shrew to Ape W. W. Norton & Company © 2009
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s “primitive” Recall that no organism sho or “higher” (“primitive” or “ ther. other. s “population”: Recall that a population was the same species that are liv same time”; the use in the c better described as a ‘comm sentence). ould be considered “lower” “advanced”) than any as defined as “individuals of ving in the same area at the current textbook may be unity’ ( e . g ., p. 259, final
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s To understand human e one must consider each process by which a pop small, solitary, shrewli scurrying through leaf Cretaceous forest ultim modern humans. evolution completely, h step in the lengthy pulation comprising like insectivores f litter in a dark mately transformed into
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s To understand how mo one must understand th and biological conditio transformation occurre odern humans evolved, the geological, climatic, ons under which the ed.
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b At the end of the Triass which were reptiles wi mostly disappeared. b One lineage of therapsi diversified, becoming m b The Cenozoic era saw of all the mammals, fol the dinosaurs. ssic period, therapsids, ith mammalian traits, sids evolved and mammals. spectacular radiation ollowing extinction of
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Geology and Clima b The earth’s continents significantly in the pas from a large mass calle seven continents we re b Continental drift affect up barriers that isolate effecting climate chang ate have moved st 200 million years, led Pangaea to the ecognize today. ts evolution by putting species and by ge.
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s The origin of the huma event in Earth history. an lineage is a late .
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Earliest hominins
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s The climate has change the last 65 million year warmer and less variab finally fluctuating in te ed substantially during rs – first becoming ble, then cooling, and emperature.
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The last 20 million yea have dramatically alter human evolution. ars of climate change
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10_from_tree_shrew_to_ape - How How Humans Evolved Chapter...

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