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What is the first oxygen-producing organism?

2 Answers

3 votes

Answer:

Cyanobacteria

Step-by-step explanation:

Cyanobacteria or blue-green algae became the first microbes to produce oxygen by photosynthesis

User Stepan Grigoryan
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5 votes

Answer:

Autotrophic Cyanobacteria.

Step-by-step explanation:

Cyanobacteria or blue-green algae became the first microbes to produce oxygen by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.

User Joel Burget
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