Biology

What are the three conditions that must be met for natural selection to occur? What should happen if those three conditions are met? Define each type of natural selection, and describe what you expect to happen over time if these types of natural selection occur. Do these types increase or decrease genetic diversity?

I know the conditions are variation for a given trait, trait variation is genetically inherited, and relationship between trait variants and fitness. I don't know how to answer the rest.

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asked by Sarah
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    posted by PsyDAG

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