Question

darwins finches on the galápagos islands evolved from different ancestors on the mainland. evolved by allopatric speciation. are indistinguishable from each other. required sympatric speciation to diversify. are similar to their mainland ancestor.

Explanation:

Darwin's finches on the Galápagos Islands evolved from a common ancestor on the mainland through allopatric speciation due to geographical isolation. They have distinct characteristics and are not similar to their mainland ancestor in many ways. Sympatric speciation is not the main mode of their diversification.

Answer:

evolved by allopatric speciation.