NEET BIOLOGY

Detailed explanation-1: -This variation helped Darwin arrive at his understanding that the finches and other birds had adapted to the islands and specific environments where they live, leading to the theory that species are not fixed and unchanging; instead, they evolve over time from common ancestors.

Detailed explanation-2: -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-3: -How are finches on the Galapagos Islands similar? How are they different? The finches are similar because they all are only found in the Galapagos. They are different because they have unique diets and beak shapes.

Detailed explanation-4: -Long, pointed beaks made some of them more fit for picking seeds out of cactus fruits. Shorter, stouter beaks served best for eating seeds found on the ground. Eventually, the immigrants evolved into 14 separate species, each with its own song, food preferences, and beak shapes.

Detailed explanation-5: -The birds on different islands had many similarities, but their beaks differed in size and shape. Four of Darwin’s finch species from the Galápagos Islands. The birds came from the same finch ancestor. They evolved as they adapted to different food resources on different islands.