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When did the first mammals appear?

paulorear

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6 years ago

When did the first mammals appear?

When did the first mammals appear?

a. about 40 million years ago
b. approximately 65 million years ago
c. over 500 million years ago
d. over 200 million years ago

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andreasoad

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paulorear Author

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6 years ago

This helped my grade so much Perfect

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