Write an experiment to show that sunlight is necessary for photosynthesis.
Answers
Answer:
To prove the necessity of sunlight in photosynthesis following steps need to do
Take a plant with destarched leaf.
Leaf is partially covered with black paper on which a design is cut.
Expose this plant to sunlight for few hours and perform a starch test with iodine solution.
Observation-
Covered leaf part shows brown colouration.
Exposed leaf shows blue-black colour.
Result- Starch is present in the exposed leaf.
Conclusion- Leaf exposed to sunlight give iodine test, proving that sunlight is necessary for photosynthesis.
Answer:
Boil the leaf in water for about 2 minutes. Now, to decolourise the leaf, transfer the leaf from boiling water to a beaker containing ethanol and boil the leaf in a water bath. ... The area of the leaf that was uncovered performed photosynthesis and will have starch, therefore turned blue-black with iodine solution.