AP BIOLOGY

Detailed explanation-1: -Complete answer: According to Darwin: Due to natural variation, the ancestors of modern giraffes have necks of different length. Giraffes with longer necks are better able to reach more food, survive and produce more high-quality offspring.

Detailed explanation-2: -According to Lamarck, the giraffe got its long neck because its ancestors stretched theirs to eat leaves that were just out of reach. This stretching of the neck was passed on to their offspring, over generations, until it reached its current length.

Detailed explanation-3: -In terms of the giraffe example, Darwin’s theory of evolution through natural selection would suggest that a giraffe was born with a longer neck by random chance. Because this individual had a longer neck, it was able to reach food sources that other animals couldn’t.

Detailed explanation-4: -Charles Darwin held up giraffes as a prime example of natural selection, his theory that’s often summarized as “survival of the fittest.” Giraffes with comparably longer necks could reach food high up in trees, which gave them an advantage over other animals and members of their own species with shorter necks.