Darwin Hypothesized that different-looking mockingbirds from the different islands might be descendants of birds that:
A. belonged to a single species that had originated on the islands.
B. belonged to a single species from the South American mainland
C. belonged to a different species from similar habitats in South America
D. had been brought to the islands by earlier visitors.

Question

Darwin Hypothesized that different-looking mockingbirds from the different islands might be descendants of birds that: 
A. belonged to a single species that had originated on the islands.
B. belonged to a single species from the South American mainland
C. belonged to a different species from similar habitats in South America
D. had been brought to the islands by earlier visitors.

anonymous · Answer

I remember this with finches not mocking birds but from what I know I would say b.  The finches he observed on the South American mainland were similar to the finches he collected on the Galapagos.  But I would need to look that up to be 100% positive.

anonymous · Answer

I'd say B, too. The process is called "adaptive radiation".