During which periods is there no overall gas exchange occurring between the leaves and the surrounding air?

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

Gas exchange in leaves typically halts at times when photosynthesis and respiration rates balance out, resulting in no net gas exchange. This occurs specifically at dawn and dusk, when the processes of gas uptake and release are in equilibrium.

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