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Arturiano [62]
2 years ago
10

Which were the earliest oxygen-producing life-forms?

Biology
2 answers:
djverab [1.8K]2 years ago
4 0
A. cyanobacteria is the answer!
s2008m [1.1K]2 years ago
3 0
A is the answer Cyanobacteria I hope this helps
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