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Another name for unicellular organisms that dominated Earth up to the Precambrian time is
A. cyanobacteria.
B. stromatolites.
C. eukaryotes.
D. prokaryotes.
The dominating life form in the Precambrian time were the unicellular organisms. Mostly the organisms were single celled prokaryotes. This is known to us by the help of fossil records.
They were thermophiles in Archaean Domain. The oldest organism that is known is about 3.5 billion years ago.
After the formation of oxygen rich environment many other species came into existence.
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