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OpenStudy (anonymous):
Current estimates based upon geology and fossil evidence suggest thatlifo is bow old? a. 1 billion years b. 2 billion years c. 3.5 billion years d. 5 billion years e. somewhere between 2 and 3 billion years The oldest fossils are interpreted as the remains of what kind of living thing? a. bacteria b. protozoa C. viruses d. eukaryotic algae e. prokaryotic protozoa
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OpenStudy (anonymous):
3.5 Billion Years Ago
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