Microevolution - Changes in the genes of populations

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Presentation transcript:

Microevolution - Changes in the genes of populations

Macroevolution The appearance of new species over time “Speciation”

Patterns of Natural selection

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

Peppered Moth: Biston betularia Industrial melanism study by Kettlewell

Genetic Drift

Convergent evolution

Evolution of Camouflage Mantis:mimicry http://www.pbs.org/wgbh/evolution/library/01/1/l_011_03.html

Orchid and Bee: coevolution http://www. pbs example of mimicry in which the orchid has evolved to resemble a female bee

Crab spider: