Darwin's Evidence - Evolution of Biological...

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12/09/09 1 Religious dogmatism has declined due to: 1. Protestant reformation 2. Shift to secular reasoning from religious reasoning 1. Increase in scientific defined evidence 2. Fossil records which show changes over time and extinction 3. Voyages of discovery many species never mentioned in the bible 4. Geological evidence on the history of the earth 5. Lamarck & Darwin described mechanisms for evolutionary change Evolution of Biological Organisms (Historical)
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12/09/09 2 If evolution is a theory, what is (are) the mechanism(s) by which it operates? Lamark: Acquired characteristics Darwin: Natural Selection
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12/09/09 3 DARWIN’S EVIDENCE Questions – How do we account for the: 1. Origins 2. Diversity 3. Adaptations 4. Scale of Nature – in living systems For natural selection as a mechanism of change in organisms over time
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12/09/09 4 Evolution (change over time) occurs by a process of Natural Selection given the following assumptions: 1. Individuals vary 2. Populations tend to over-breed 3. Struggle for existence 4. Survival of the fittest 5. Variations are inherited 6. New species develop Hypothesis for Natural Selection:
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12/09/09 5 Deduction 1. (prediction)
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