Answer
The animal group of mammals became the dominant land animals of the Cenozoic Era.
Work Step by Step
The Cenozoic Era is commonly known as the Age of Mammals.
Earth: An Introduction to Physical Geology (12th Edition)
by Tarbuck, Edward J.; Lutgens, Frederick K.; Tasa, Dennis G.
Published by
Pearson
ISBN 10:
0134074254
ISBN 13:
978-0-13407-425-2
Chapter 22 - Section 22.9 - Cenozoic Era: Age of Mammals - Concept Checks - Page 697: 1
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