The oldest known fossils of prokaryotes are found in rocks dated at about ______ years old.
A)3.5 million
B)35 million
C)350 million
D)3.5 billion
E)35 billion

Name: The oldest known fossils of prokaryotes are found in rocks dated at about ______ years old. A)3.5 million B)35 million C)350 million D)3.5 billion E)35 billion
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The oldest known fossils of prokaryotes are found in rocks dated at about 3.5 billion years old. These ancient microorganisms are among the earliest evidence of life on Earth.

The Oldest Known Fossils of Prokaryotes Are Found in Rocks