NEET BIOLOGY

Detailed explanation-1: -The pebble could attract emperor penguins that have been layer of fat under the skin called blubber. It is stay warm in the cold places and they could even consider normal body and about 100 degrees.

Detailed explanation-2: -But for Adelie and Gentoo penguins, they also need the perfect pebble to seal the deal. These penguins live on rocky shores and prize these small stones to build their nests during mating season. During courtship, a male penguin will find the smoothest pebble to give to a female as a gift.

Detailed explanation-3: -Gentoo penguins are monogamous and have up to three breeding seasons, but generally they find new partners after that.

Detailed explanation-4: -Mate selection is up to the female, and it is the females that compete for the males. In some penguin species, a female selects the same male from the preceding season to mate with. Adélie penguins have been documented re-pairing with the previous year’s mate 62% of the time.

Detailed explanation-5: -For speciation to occur, two new populations must be formed from one original population, and they must evolve in such a way that it becomes impossible for individuals from the two new populations to interbreed.