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Based on fossil evidence, about how long ago did the first single celled life fork appear on earth?

Based on fossil evidence, about how long ago did the first single celled life fork appear on earth?
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Based on fossil evidence, about how long ago did the first single celled life fork appear on earth?

User Arrovil
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Answer:

it was exactly 3.5 billion years ago

Step-by-step explanation:

User Werner Raath
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