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3 years ago

Oxygen levels first rose in the atmosphere because of _____.

Physics

2 answers:

tigry1 [53]3 years ago

5 0

<u>The answer to your question is going to be option "D."</u>

Oxygen levels first rose in the atmosphere because of (the last option, or "D') cyanobacteria. Cyanobacteria is a type of bacteria that can create toxins that are very dangerous to both humans and animals.

I hope this helps! :)

Umnica [9.8K]3 years ago

3 0

Hey there!

Your answer = D. Cyanobacteria

They gain their energy through the photosynthesis.

Hope this helped!

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2 years ago

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2 years ago