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My name is Ann [436]
3 years ago
9

Please Help, this is for a Unit Test

Biology
1 answer:
sukhopar [10]3 years ago
6 0

Living organisms account for the significant increase in oxygen in the Earth's atmosphere 2 to 2.5 billion years ago (Option A). It was due to the emergence of cyanobacteria.

<h3>What are cyanobacteria?</h3>

Cyanobacteria, also known as blue-green algae, are microorganisms capable of performing photosynthesis.

Photosynthesis is a series of chemical reactions by which algae produce oxygen from carbon dioxide and solar energy.

Cyanobacteria are microorganisms that generated the current atmosphere with oxygen, which helped the development of life on the Earth.

Learn more about cyanobacteria here:

brainly.com/question/90932

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