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    Exam 10: Classification of Microorganisms
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    Fossil Evidence Indicates That Prokaryotic Cells First Existed on the Earth
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Fossil Evidence Indicates That Prokaryotic Cells First Existed on the Earth

Question 18

Question 18

Multiple Choice

Fossil evidence indicates that prokaryotic cells first existed on the Earth


A) 350 years ago.
B) 3500 years ago..
C) 3500 years ago
D) 3.5 billion years ago.
E) 3.5 × 1012 years ago.

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