mordinho
Single-celled microorganisms were the first life to evolve on earth, around four billion years ago. These were the ancestors of modern bacteria.
Bacteria
Evolution of bacteria on earth
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replied to: mordinho
giotto22
Replied to: Single-celled microorganisms were the first life to evolve on earth, around...
Bacterial fossils exist, but, since they lack distinctive features, it is difficult to study the early history of bacterial evolution.