Evolutionary Changes

Evolutionary Changes - E volutionary Changes, Natural...

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Evolutionary Changes, Natural Selection, Adaptation Early Greeks, Linnaeus, Buffon, Cuvier, Lamarck, Malthus, Hutton, Lyell, Eramus, Darwin Darwin 1. Organisms change over time, all derive from common ancestor through branching, gradual & slow, mechanism is evolution Microevolution-changes in genetic composition; macroevolution—the gradual change of living things from one form (species) into another—descent through ancestral forms Observations—individuals differ in characteristics in behavior—infinite variation and some is heritable (offspring tend to look like parents) 2. Organisms have huge potential to reproduce and increase in number so competition is scarce3. Differential fitness and mortality Consequence of NS is ADAPTATION Sexual selection-based on differential success in mating; certain characteristics evolve in one sex because of advantages conferred in mating ***adaptation is consequence of NS, species change and new organisms form, direction is random in long term
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This note was uploaded on 08/26/2011 for the course ANTHRO 200 taught by Professor Gouzoulesandkonner during the Spring '11 term at Emory.

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Evolutionary Changes - E volutionary Changes, Natural...

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