Two squirrel varieties (the Abert squirrel and the Kaibab

squirrel) have a common ancestor that lived in Northern

Arizona. About 10,000 years ago, the Grand Canyon was

carved out of land in Northern Arizona, leaving populations

of the ancestral squirrel species separated from one

another. Today, in the area of the Grand Canyon, the Abert

squirrel lives only on the canyon's south rim, while the

Kaibab squirrel lives on the north rim.

What type of speciation has occurred between these two varieties of squirrels?

A. Reproductive isolation

B. Disruptive selection

C. Temporal isolation

D. Behavioral isolation

Tan

Question

Biology

Mckenna Thornton

17 February, 19:40

Two squirrel varieties (the Abert squirrel and the Kaibab

squirrel) have a common ancestor that lived in Northern

Arizona. About 10,000 years ago, the Grand Canyon was

carved out of land in Northern Arizona, leaving populations

of the ancestral squirrel species separated from one

another. Today, in the area of the Grand Canyon, the Abert

squirrel lives only on the canyon's south rim, while the

Kaibab squirrel lives on the north rim.

What type of speciation has occurred between these two varieties of squirrels?

A. Reproductive isolation

B. Disruptive selection

C. Temporal isolation

D. Behavioral isolation

Tan

+1

Answers (1)

Know the Answer?

Samara Newton · Answer 1

B. Disruptive Selection

Explanation:

the population is divided into two distinct groups, or is disrupted so the gentics start to vary between the separted populations over time.