Which of the following is an example of directional selection on size?
A) Both small and large individuals survive.
B) Only large individuals survive.
C) The proportion of small and large individuals remains the same.
D) Neither small nor large individuals survive.

Question

Quizplus · Accepted Answer

Directional selection on size occurs when one extreme of a size range has a higher fitness than the other. In this case, only large individuals survive, which means that individuals that are smaller than the selected range do not survive and reproduce, while individuals that are larger than the selected range have higher fitness and reproduce more. This results in a shift of the population towards larger sizes over time.

Which of the Following Is an Example of Directional Selection