Which period had the greatest increase in the number of extant species?
A) Paleozoic
B) Mesozoic
C) Cenozoic
D) Permian

Name: Which period had the greatest increase in the number of extant species? A) Paleozoic B) Mesozoic C) Cenozoic D) Permian
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The Cenozoic period is often referred to as the Age of Mammals and saw the greatest increase in the number of extant species due to the adaptive radiation of mammals, including primates, rodents, ungulates, and carnivores.

Which Period Had the Greatest Increase in the Number of Extant