You are studying leaf size in a natural population of plants. The second season is particularly dry, and the following year the average leaf size in the population is smaller than the year before. But the amount of overall variation is the same, and the population size hasn’t changed. Also, you’ve done experiments that show that small leaves are better adapted to dry conditions than are large leaves. Which of the following has occurred?

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    directional selection
    the founder effect
    stabilizing selection
    disruptive selection
    genetic drift

asked May 30, 2013 in Biology by anonymous

1 Answer

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directional selection
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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