LIFE SCIENCE

Detailed explanation-1: -Geographical Isolation (allopatry) The proximity of the various islands has permitted enough migration of Darwin’s finches between them to enable distinct island populations to arise. But the distances between the islands is great enough to limit interbreeding between populations on different islands.

Detailed explanation-2: -Orca. The divergence of “resident” and “transient” orca forms in the northeast Pacific is an uncommon example of sympatric speciation. Despite living in the same water, orcas avoid each other and do not interbreed. They are different in many ways like having different diets, vocal behavior, and social structure.

Detailed explanation-3: -An organism develops different courtship rituals which do not attract main population this would lead speciation. Orcas occur in the same habitat but some are avoiding each other and do not interbreed. They have different diets, vocal behavior, and social structures.

Detailed explanation-4: -Which of the following lines of evidence shows that whales are descended from a land-dwelling, four-legged ancestor? Whale embyros have similar structure to embryos of land-dwelling mammals, birds, and reptiles. An analysis of DNA shows that whales’ closest living relatives are hippopotamuses.