TREE PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A student wanted to see if covering a leaf in foil would stop it from producing starch. Why should the student put the plant in a dark cupboard for 48 hours before returning it to the light and starting the experiment?
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To make the results reliable
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So that the plant would photosynthesise faster when returned to the light
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So that any starch already in the leaf was used up by the plant
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None of the above
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Explanation:
Detailed explanation-1: -Answer – the plant was kept in dark before experiment so as to remove the starch from the leaves . It is kept for 24 – 48 hours, during this time period the leaves are destrached and the starch is stored in the storage organs .
Detailed explanation-2: -It is necessary to destarch a plant before performing any experiment on photosynthesis to ensure that leaves are free from starch . So that it may not influence the result of the experiment.
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