In a population of mice that you are studying, tail length appears to be increasing over time.

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In a population of mice that you are studying, tail length appears to be increasing over time. However, you find no evidence that natural selection is acting on tail length.

What are two alternative explanations for your observation?

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Conceptual Integrated Science

ISBN: 9780321818508

2nd Edition

Authors: Paul G Hewitt, Suzanne A Lyons

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