NEET BIOLOGY

Detailed explanation-1: -In other words, beaks changed as the birds developed different tastes for fruits, seeds, or insects picked from the ground or cacti. 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.

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: -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: -Environmental change coupled with the gene HMGA2 drove the rapid evolution of a smaller overall beak size in the medium ground finch (Geospiza fortis) that inhabits Daphne Major in the Galápagos Islands.