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Question

In the experiment to prove that light is necessary for photosynthesis, why is the plant kept in dark for three to four days?

A
To destroy the chlorophyll molecules.
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B
To soften the tissues of plants.
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C
To make the cell permeable to iodine.
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D
To use up the starch that was produced earlier.
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Solution

The correct option is D To use up the starch that was produced earlier.
In the experiment to prove that light is necessary for photosynthesis, the plant is kept in dark for three to four days in order to use up the starch that was produced earlier. It is done to avoid false positive results.

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