Which experiment can show that light is necessary for photosynthesis?
Answer and explanation
Correct answer: Covering part of a leaf and testing for starch
The governing idea is a controlled experiment using starch as evidence of photosynthesis. After destarching a plant, part of a leaf is covered so it receives no light while the remaining part is exposed. After exposure, iodine turns the illuminated region blue-black because starch formed there, whereas the covered region does not. This comparison supports option A and controls the effect of light.
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What is the correct answer to this question?
Covering part of a leaf and testing for starch
Why is this the correct answer?
The governing idea is a controlled experiment using starch as evidence of photosynthesis. After destarching a plant, part of a leaf is covered so it receives no light while the remaining part is exposed. After exposure, iodine turns the illuminated region blue-black because starch formed there, whereas the covered region does not. This comparison supports option A and controls the effect of light.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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