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Variation, selection and species

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Which difference most directly supplies heritable variation for selection?

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Which sentence completes a natural-selection explanation?

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What additional observation most directly supports selection as the cause of a frequency rise?

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Why can selection against aa fail to remove a completely?

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Which evidence best supports a boundary under the biological species concept?

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Question 1 of 5

Separate allele creation and reshuffling

Explain how mutation, meiosis and sexual reproduction supply variation and why heritable variation is necessary for natural selection to cause evolutionary change.

Do not say that every new combination is a new allele.

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