A decrease in photosynthesis primarily leads to a reduction in the production of which substance?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Biology Mcqsbiology-mcqs
Published
23 May 2018
Last updated
28 May 2026

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Explanation

When photosynthesis slows down, the generation of oxygen (O2) decreases because oxygen is a byproduct of the photosynthetic process. Carbon dioxide and water are consumed during photosynthesis, and light energy is the input, not the output.

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