Based on radiometric dating and the rock and fossil record, scientists have concluded that life has been present on Earth A. for about 1 billion years. B. for about 50,000 years. C. for no more than 10 million years. D. for at least 3.5 billion years.
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Home » Biology » Based on radiometric dating and the rock and fossil record, scientists have concluded that life has been present on Earth A. for about 1 billion years. B. for about 50,000 years. C. for no more than 10 million years. D. for at least 3.