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When did stromatolites appear on Earth? A. Hadean B. Mesozoic C. Archean
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When did stromatolites appear on Earth?

A. Hadean
B. Mesozoic
C. Archean

User Njsf
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2 Answers

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Answer: It's C: Archean

Explanation: I got it right on the quiz.

User Vinayak Kini
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Answer:

It would be D. Proterozoic because they appeared 542 million years ago.

User Yoshimitsu
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