Biology, 06.06.2020 00:00, bellabasketball5173

Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth? 130 million years ago 1.5 billion years ago 2.5 billion years ago 4.1 billion years ago

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Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth?...