The observation that a whale's front flippers have the same bone structure as all mammalian forelimbs suggests that
A)all mammals descended from a common ancestor.
B)whales once walked on land.
C)whales show remarkable diversity.
D)land mammals originally came from the sea.
E)there must have been land and aquatic ancestors that coevolved.

Question

Quizplus · Accepted Answer

The fact that a whale's front flippers have the same bone structure as all mammalian forelimbs indicates that they share a common ancestor. This supports the theory of evolution, which suggests that all organisms on Earth are descended from a common ancestor.

The Observation That a Whale's Front Flippers Have the Same