During the Early _____, life consisted of prokaryotic cells, but by the end of this geologic time span, multicellular eukaryotic organisms had evolved.

During the Early _____, life consisted of prokaryotic cells, but by the end of this geologic time span, multicellular eukaryotic organisms had evolved.
A)Cenozoic era
B)Paleozoic era
C)Mesozoic era
D)Archaean eon
E)Proterozoic eon


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