Is it true that plants respire only when it is dark?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
Plants respire all the time, day and night. However, photosynthesis occurs during the day when there is sunlight. And sunlight is important for photosynthesis. But light does not affect cellular respiration because the process of cellular respiration is not dependent on light. Basically, plant respiration happens 24 hours per day, but night respiration is more obvious as the photosynthesis process ceases.
The corrected statement would be, “Plants respire all the time, day and night”.

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