which best describes biogeographic isolation?\n○ it always leads to the formation of new species.\n○ it…
which best describes biogeographic isolation?\n○ it always leads to the formation of new species.\n○ it cannot lead to evolution.\n○ it is a mechanism for evolution.\n○ it occurs only through geographic forces.
Answer
Brief Explanations:
- Analyze each option:
- Option 1: Biogeographic isolation doesn't always form new species (e.g., populations might adapt without speciation), so incorrect.
- Option 2: Biogeographic isolation can drive evolution (e.g., by creating different selection pressures), so "cannot lead to evolution" is wrong.
- Option 3: Biogeographic isolation (geographic separation) is a mechanism for evolution as it can cause genetic divergence via natural selection, genetic drift, etc., making this correct.
- Option 4: It's not only geographic forces (e.g., ecological factors can also isolate populations), so incorrect.