Question

when the grand canyon in arizona formed, two populations of the squirrel species were separated by the giant canyon. this is an example of ________. geographic isolation temporal isolation behavioral isolation

Explanation:

Geographic isolation occurs when a physical barrier (like the Grand Canyon here) separates populations of a species, preventing gene flow. Temporal isolation is about different breeding times, and behavioral isolation is about different mating behaviors. Since the canyon is a geographic barrier separating the squirrel populations, this is geographic isolation.

Answer:

A. Geographic isolation