a population of butterflies on an island varies in wing size. some have large wi

Question

a population of butterflies on an island varies in wing size. some have large wings and some have small, but they still belong to the same species. all are doing well until a meteorite hits the island and kills many of the butterflies. more large- winged than small winged butterflies are killed. which of the following should we expect if we compare the next generation to the one that got hit?

a. directional selection has occurred
b. evolution has occurred
c. sexual dimorphism has occurred
d. none of the above should occur because this was a random stochastic event

Explanation / Answer

b. evolution has occurred

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