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9 votes
Which of the following groups evolved first?

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

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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