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Questions
Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? Explain.
Give reasons/explain:
It is necessary to place a plant in the dark before starting an experiment on photosynthesis.
Solution
The presence of starch is regarded as evidence of photosynthesis. Hence before starting an experiment on photosynthesis, the plant should be placed in the dark for 24-48 hours to destarch the leaves. During this period, all the starch from the leaves will be sent to the storage organs and the leaves will not show the presence of starch. So the various experiments on photosynthesis can be carried out effectively.
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