A biologist doing a long-term study on a wild spider population observes increased variation in silk thickness.She hypothesizes that the population is experiencing
A)directional selection.
B)stabilizing selection.
C)disruptive selection.
D)sexual selection.
E)genetic drift.

Question

Quizplus · Accepted Answer

Disruptive selection would lead to increased variation in a trait, as extremes of the trait are favored over the intermediate values. In this case, the thicker and thinner silk may both have selective advantages, leading to the observed variation.

A Biologist Doing a Long-Term Study on a Wild Spider