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5 votes
Based on fossil evidence, about how long ago did the

first single-celled life form appear on Earth?O 130 million years ago

O 1. 5 billion years ago

O

2. 5 billion years ago

O

4. 1 billion years ago

1 Answer

6 votes
1.5 million years ago.

Please let me know if i’m wrong, thank you!
User Indago
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