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Which of the following groups evolved first? A. Dinosaurs B. Insects C. Mammals D. Birds
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Which of the following groups evolved first?

A. Dinosaurs
B. Insects
C. Mammals
D. Birds

User Craig Jones
by
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1 Answer

7 votes
C,) Mammals

Mammals first appeared at least 178 million years ago, and scampered amid the dinosaurs until the majority of those beasts, with the exception of the birds, were wiped out 66 million years ago.
User ThaJay
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