Take a potted plant and keep it in a dark
room for 24 hours. Since the leaves do not
receive sunlight, they will not be able to
prepare food. After 24 hours, there will be no
food left in the leaf. Now cover a portion of
the leaf with a strip of black paper. Put the
plant in sunlight for a few hours.
Pluck the leaf and test it for starch. In
which portions of the leaf is starch present?
In which portions is it not present?
If starch is present only in the portion
that was not covered, what do you conclude?
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Answer:
yes, starch is present only in the portion that was not covered because of sunlight
the portion of plant that is covered do not contain any type of starch due to darkness, lack of sunlight and you know that without sunlight plants are not able to prepare food
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