Most major groups of animals had appeared on Earth by the ____ period.
A)Triassic
B)Carboniferous
C)Cambrian
D)Devonian
E)Cretaceous

Name: Most major groups of animals had appeared on Earth by the ____ period. A)Triassic B)Carboniferous C)Cambrian D)Devonian E)Cretaceous
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Question

​Most major groups of animals had appeared on Earth by the ____ period.
A)​Triassic
B)​Carboniferous
C)​Cambrian
D)​Devonian
E)​Cretaceous

Quizplus · Accepted Answer

The Cambrian period saw the rapid diversification and appearance of most major groups of animals on Earth through the process of the Cambrian Explosion.

​Most Major Groups of Animals Had Appeared on Earth by the ____

Most Major Groups of Animals Had Appeared on Earth by the ____