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Question
A student covered a leaf from a destarched potted plant with a black paper strip and kept the plant in the garden in the morning hours. In the evening he tested the covered portion of the leaf to test the presence of starch. In this case, the student was trying to show that:
A student covered a leaf from a destarched potted plant with a black paper strip and kept the plant in the garden in the morning hours. In the evening he tested the covered portion of the leaf to test the presence of starch. In this case, the student was trying to show that:
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Solution
The correct option is D Light is necessary for photosynthesis
- The covered leaf part with a black paper strip, when tested for presence of starch gives negative test i.e. there is no starch produced in them.
- This case shows that light and water are essential for production of food (photosynthesis) in the plant. And as the covered part doesn't get any proper light, no starch is produced in that region of the plant.
- Hence, light is necessary for photosynthesis. Option "D" is correct.
- The covered leaf part with a black paper strip, when tested for presence of starch gives negative test i.e. there is no starch produced in them.
- This case shows that light and water are essential for production of food (photosynthesis) in the plant. And as the covered part doesn't get any proper light, no starch is produced in that region of the plant.
- Hence, light is necessary for photosynthesis. Option "D" is correct.
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