Different finch species inhabit different Galapagos islands; each has a beak adapted to a different food source.
Why do related finch species on different Galapagos islands show different beak shapes?
- Acheck_circle
Adaptive radiation following geographic isolation and divergent selection
- B
Genetic drift unaffected by environment
- C
Lamarckian inheritance of feeding behavior
- D
Convergent evolution from unrelated mainland ancestors
Explanation
Galapagos finches descended from a common ancestor and diversified across islands. Different food resources on each island created divergent selection, producing distinct beak morphologies (adaptive radiation).