When two populations of a species are present on two extreme ends of a forest, they are in
- A. Seasonal isolation
- B. Geographic isolation
- C. Ethological isolation
- D. Temporal isolation
Answer: B. Geographic isolation
Geographic isolation occurs when a physical barrier like a mountain range, river, or even a dense forest separates two populations, preventing them from interbreeding. This is a key factor in allopatric speciation, where isolated populations evolve independently due to different selection pressures and genetic drift.