Answers

2016-02-04T20:17:18+05:30
Its believed to be a simple micro scophic organims.Some of them evoluted into algea while others evoluted into fishes or aquatic animals with no back bones.
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2016-02-04T20:23:30+05:30
Bacteria was the first creature on earth it lived in water and could survive high toxicity. 
plz mark it as the brainliest if helped 
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