Home Biology Ecosystem Decomposition Photosynthesis and respiration are central t…
Biology Ecosystem Decomposition Single Correct MCQ
Published on: August 20, 2026

Photosynthesis and respiration are central to which cycle?

A
The nitrogen cycle
B
The carbon cycle
C
The phosphorus cycle
D
The sulphur cycle

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Verified by Experts
The correct answer is:
B

Photosynthesis absorbs carbon dioxide from the atmosphere and stores it in plants as organic compounds.Respiration releases carbon dioxide back into the atmosphere.

Together, these processes drive the carbon cycle, moving carbon between organisms and the environment.

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