'Gametic isolation' presentation slideshows

Chapter 24 The Origin of Species

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The Origin of Species

The Origin of Species. Species. Biological Species. Ring Species. Prezygotic Habitat Isolation Behavior Isolation Temporal Isolation Mechanical Isolation Gametic Isolation. Postzygotic Hybrid Sterility Hybrid Inviability Hybrid Breakdown. Barriers. Habitat Isolation.

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Macroevolution: speciation Tuesday 11/5/13

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Speciation

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How Natural Selection works

How Natural Selection works. Natural selection works on phenotypes Natural Selection reduces variation. Normal Distribution. Bell shaped curve Most organisms have an average trait Has variation. Make sure you draw these in your notes!. Directional Selection.

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