The oldest fossils are those of tiny bacteria, which are classified as prokaryotes. Why are these organisms classified as prokaryotes?
A) They are single-celled organisms that lack internal membrane-bound compartments.
B) They consist of cells that lack any genetic information.
C) They are the first organisms that appeared on Earth.
D) They are single-celled organisms that no longer exist on Earth.
Ans: A) They are single-celled organisms that lack internal membrane-bound compartments.
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