Class 03 - Sept 3 - 1 IB35 Human Biological Variation Class...

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Unformatted text preview: 1 IB35 Human Biological Variation Class #3 Topics for today: Darwin and Evolutionary Theory Phylogenetics A Sense of Time 4 generations ago (1900) 9 generations ago (1776) 21 generations ago (1500 AD) 172 generations ago (2300 BC 172 generations ago (2300 BC) 8,100 generations ago (160,000 years ago) 285,700 generations ago (6 million years ago) The Earliest Hominids Ardipithecus 4.5 6 mya Honing upper canine (seen here in a baboon) Australopithecus 4.2 2.5 mya We know the most about Australopithecus afarensis (4.2 3.5 mya) 9/2/2009 2 Characteristics of Australopithecus Bipedal Brain size like modern great apes Large teeth Relatively small canines Fast growth rates chimpanzee human A. afarensis Key Events Key Events Bipedal Bipedal 6.0 mya 6.0 mya Loss of honing complex Loss of honing complex 6.0 mya 6.0 mya Reduced canine dimorphism Reduced canine dimorphism 3.5 mya 3.5 mya Regular use of modified stone tool Regular use of modified stone tool 2 6 mya 2 6 mya Regular use of modified stone tools Regular use of modified stone tools 2.6 mya 2.6 mya Regular use of animal carcasses Regular use of animal carcasses 2.5 mya 2.5 mya First relative brain enlargement First relative brain enlargement 2.0 mya 2.0 mya First major dispersal event (diaspora) First major dispersal event (diaspora) 2.0 mya 2.0 mya William Paley Natural Theology (1802) the blind watchmaker analogy Charles Darwin Charles Darwin 1809 1809 1882 1882 Voyage of the Beagle Voyage of the Beagle 1831 1831-1836 1836 9/2/2009 3 Charles Lyell Charles Lyell 1797 1797 1875 1875 Principles of Geology Principles of Geology (elaborated on Huttons uniformitarianism) (elaborated on Huttons uniformitarianism) Georges Cuvier French anatomist 1769 1832 catastrophism catastrophism Darwins most important Darwins most important observations on his trip: observations on his trip: Succession of fossil animals in South Succession of fossil animals in South America America Geographical variation in species Geographical variation in species Geographical variation in species...
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This note was uploaded on 01/19/2011 for the course IB 35AC taught by Professor Hlusko during the Spring '08 term at University of California, Berkeley.

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Class 03 - Sept 3 - 1 IB35 Human Biological Variation Class...

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