Prokaryotic cells have been identified in rock dated at ____________
A)2.7 million years old
B)2.7 billion years old
C)2.4 million years old
D)2.4 billion years old
E)4 billion years old

Question

Quizplus · Accepted Answer

Prokaryotic cells, which are simple, single-celled organisms without a nucleus, have been identified in rocks that are about 2.7 billion years old, indicating the ancient existence of life on Earth.

Prokaryotic Cells Have Been Identified in Rock Dated at ____________