Question

question 2 of 10
why does geographic isolation cause speciation?
a. it prevents the two populations from interbreeding.
b. it decreases divergence between two populations.
c. it increases gene flow between two populations.
d. it causes adaptive radiation between two populations.

Explanation:

Geographic isolation physically separates populations, preventing interbreeding. Lack of gene - flow due to isolation leads to genetic divergence over time, which can result in speciation. Option B is incorrect as it increases divergence, not decreases. Option C is wrong since it reduces gene - flow. Option D is not correct as it doesn't directly cause adaptive radiation between populations.

Answer:

A. It prevents the two populations from interbreeding.