Animal life underwent its greatest diversification during the ________,which began about ________ million years ago.

Question

Quizplus · Accepted Answer

The Paleozoic era began about 540 million years ago and is known as the time of great diversification of animal life. The Mesozoic era began about 245 million years ago, but it is characterized by the dominance of dinosaurs rather than a diversification of animal life. Therefore, the best choice is B.

Animal Life Underwent Its Greatest Diversification During the ________,Which Began