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erastovalidia [21]
3 years ago
6

What component of Earth’s atmosphere exists entirely as a result of photosynthesis?

Biology
2 answers:
beks73 [17]3 years ago
5 0

Answer:

A

Explanation:

marysya [2.9K]3 years ago
3 0
Hello, the correct answer is A because plants use carbon dioxide and transform it into oxygen gas. 
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Catabolic reactions are exergonic.

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