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14-03-2021
Biology

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about how long ago did the first single-celled life form appear on Earth?

A. 130 million years ago
B. 1.5 billion years ago
C. 2.5 billion years ago
D. 4.1 billion years ago

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14-03-2021

Answer:

Around 4.1 billion years ago, the first single celled life form appeared on Earth

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