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Home Q & A Board Science-Related Homework Help Physics Astronomy
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adreamer adreamer
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6 years ago
Microfossil evidence suggests that life
A) originated when the Earth formed 4.6 billion years ago
B) originated about 3.4 billion years ago
C) existed 3.85 billion years ago
D) existed and was well established by 3.4 to 3.5 billion years ago
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
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19Clyde19Clyde
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adreamer Author
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#2
6 years ago
Thanks!
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