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 is a mechanism that can lead to evolution. It does not always result in new species formation (so the first option is wrong). It can lead to evolution (so the second option is wrong). It can occur through non - geographic forces like ecological barriers (so the fourth option is wrong).

Answer:

It is a mechanism for evolution.