Microevolution - Changes in the genes of populations

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Microevolution - Changes in the genes of
populations
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Macroevolution

• The appearance of new species over time
• Speciation

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Patterns of Natural selection
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If the Siberian Husky had heavier muscles, it
would sink deeper into the snow, so they would
move slower or would sink and get stuck in the
snow. Yet if the Siberian Husky had lighter
muscles, it would not be strong enough to pull
sleds and equipment, so the dog would have little
value as a working dog
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Peppered Moth Biston betularia

• Industrial melanism study by Kettlewell

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Natural Selection
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Migration
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Mate Choice
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Mutations
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Genetic Drift
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• Convergent
• Evolution

Convergent evolution
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Coevolution - Evolution of Camouflage

• Mantismimicry http//www.pbs.org/wgbh/evolution/l
  ibrary/01/1/l_011_03.html

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Orchid and Bee coevolution http//www.pbs.org/wgb
h/evolution/library/01/1/l_011_02.html
example of mimicry in which the orchid has
evolved to resemble a female bee
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Crab spider
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Adaptive Radiation
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Extinction
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