Question

which best describes biogeographic isolation?
it always leads to the formation of new species.
it cannot lead to evolution.
it is a mechanism for evolution.
it occurs only through geographic forces.

Explanation:

Biogeographic isolation involves physical barriers separating populations, limiting gene flow. This isolation allows independent evolutionary changes, making it a mechanism for evolution. It does not always form new species (depends on other factors), can lead to evolution, and while often geographic, is not strictly limited to geographic forces alone.

Answer:

C. It is a mechanism for evolution.