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Evidence-Based Date Range for Life’s Origin
Grade Level
AP Biology
APB.416 Evidence-Based Date Range for Life’s Origin
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Which proposed origin model is inconsistent with both major evidence constraints?
A
Life originated at 4.5 bya, before the end of highly hostile conditions
B
Life originated between about 3.9 and 3.5 bya
C
Life originated by the time fossils appear at about 3.5 bya
D
Life originated after conditions became less hostile around 3.9 bya
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