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Which of the following examples likely occurred through natural selection?

A.Some humans have hair on the middle part of their fingers, while others do not.

B.Giraffes have longer necks than their ancestors.

C.In a litter of puppies, some puppies have brown fur while others have black fur.

D.There are several colors of roses, such as red, white, pink, and yellow.

Sagot :

TSO
B.

giraffes with short necks ate all the small trees. Giraffes with long necks were able to eat the short trees and the bigger trees. So when the smaller trees were finished the smaller giraffes died out and the taller giraffes passed the trait for having alonger necks along.

So B is your answer :)
During the natural selection, B) Giraffes had longer necks than their ancestors. Giraffes are a ruminant, of the genus Giraffa , of the African savannah with long legs and highly elongated neck, which make it the tallest living animal; yellow fur patterned with dark spots, often in the form of a network; and two or more short, skin-covered horns.
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