AP BIOLOGY

Detailed explanation-1: -However, the Galapagos finches helped Darwin solidify his idea of natural selection. The favorable adaptations of Darwin’s Finches’ beaks were selected for over generations until they all branched out to make new species. These birds, although nearly identical in all other ways to mainland finches, had different beaks.

Detailed explanation-2: -With his voyage over and with a £400 annual allowance from his father, Darwin now settled down among the urban gentry as a gentleman geologist. He befriended Lyell, and he discussed the rising Chilean coastline as a new fellow of the Geological Society in January 1837 (he was secretary of the society by 1838).

Detailed explanation-3: -1: Darwin’s Finches: Darwin observed that beak shape varies among finch species. He postulated that the beak of an ancestral species had adapted over time to equip the finches to acquire different food sources.

Detailed explanation-4: -Eventually Darwin theorized that different species of finch had evolved on different islands, their distinctive beaks being an adaptation to distinct natural habitats or environmental niches.