Question

evolution is change in a population over time and includes the gene pools of that population. how does biogeographic isolation allow for the change of gene pools over time?
○ biogeographic isolation affects the random changes that take place within gene pools.
○ biogeographic isolation causes changes in gene pools that result from populations being separated.
○ biogeographic isolation determines who will win competition for mates.
○ biogeographic isolation determines the time that populations will breed.

Explanation:

To solve this, we analyze each option:

• Option 1: Biogeographic isolation doesn't directly affect random changes (like genetic drift) within a single gene pool; it separates populations, so this is incorrect.
• Option 2: Biogeographic isolation separates populations. When populations are separated, their gene pools can change independently due to different selection pressures, mutations, etc. This matches how biogeographic isolation leads to gene pool changes.
• Option 3: Biogeographic isolation is about geographic separation, not mate competition, so this is incorrect.
• Option 4: Biogeographic isolation is not related to determining breeding time; it's about geographic separation, so this is incorrect.

Answer:

B. Biogeographic isolation causes changes in gene pools that result from populations being separated.