AP BIOLOGY

Detailed explanation-1: -From this one migrant species would come many–at least 13 species of finch evolving from the single ancestor. This process in which one species gives rise to multiple species that exploit different niches is called adaptive radiation.

Detailed explanation-2: -In Darwin’s finches, those that have short beaks turned out to be an adaptation that made them more suited into poking holes in the ground and feed on grubs. 3. Darwin’s finches are an example of how natural selection caused variation of beaks among finches.

Detailed explanation-3: -On the Galápagos, finches evolved based on different food sources-long, pointed beaks served well for snatching insects while broad, blunt beaks work best for cracking seeds and nuts.

Detailed explanation-4: -Evolution in Darwin’s finches is characterized by rapid adaptation to an unstable and challenging environment leading to ecological diversification and speciation. This has resulted in striking diversity in their phenotypes (for instance, beak types, body size, plumage, feeding behavior and song types).

Detailed explanation-5: -The Galápagos finches are a classic example of adaptive radiation. Their common ancestor arrived on the islands a few million years ago. Since then, a single species has evolved into different species that are adapted to fill different lifestyles.