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7 BISC_120 Evolution Debate

7 BISC_120 Evolution Debate - Reminders First lecture quiz...

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1 1 Reminders • First lecture quiz begins on Friday (Sept 10) – Available on Blackboard from Friday at noon until Monday at noon – Covers lectures 3-7 • Friday (Sept 10) is the last day to register, add classes or drop without a ‘W’ The Case For and Against Evolution Ch. 22.3 “Teach both. You know, don’t be afraid of information.” - Sarah Palin, 2006 3 You are here 4 The movie Flock of Dodos by USC Prof Randy Olson tries to explain why many Americans don’t believe in evolution http://www. youtube .com/watch? v=GU8V5oTIwKM
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2 5 Arguments against evolution 6 Argument: Evolution cannot be observed and therefore cannot be proven 7 Rebuttal: Evolution is observed all the time! 8 Rebuttal cont’d: We cannot observe the entirety of evolution and therefore rely on diverse lines of evidence, just as we do in other fields of science
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3 9 Argument: There are no transitional fossils 10 “…Why, if species have descended from other species by fine gradations, do we not everywhere see innumerable transitional forms?” -from The Origin chapter entitled Difficulties on Theory 11 Rebuttal: The fossil record is spotty, but there are transitional forms Ex)Transition between fish and amphibians Acanthostega 12 Ex) Transition between bird and reptile Archeopteryx
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4 Ex) Transitions between horse species 14 Ex) Transition from terrestrial ancestor to whale 15 Ex) Transitional fossil flatfish with partially migrated eyes One eye on each side of head Transitional fossil: partial migration Both eyes on one side of head Nature 454: 169-170, 2008 16 Argument: Chance cannot create complexity
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