Suppose a population of mostly sand-colored crabs migrates from a sand beach to a pebble beach and evolves a darker, speckled coloration that closely resembles the pebble beach. This is an example of
A) directional selection.
B) stabilizing selection.
C) disruptive selection.
D) sexual selection.
E) genetic drift.

Question

Quizplus · Accepted Answer

This is an example of directional selection because the population evolves to adapt to a new environment (pebble beach) by changing coloration, indicating a shift in the population's traits towards those that are advantageous in the new environment.

Suppose a Population of Mostly Sand-Colored Crabs Migrates from a Sand