14. DESCRIBE THE EXPERIMENT TO SHOW HOW LIGHT IS NECCESARY FOR
PHOTOSYNTHESIS.
Answers
Answer:
Experiment to show that sunlight is necessary for photosynthesis - definition. 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.
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Observation: The portion of the leaf exposed to light gives positive starch test, i.e., it becomes deep blue in iodine solution, whereas, the covered portion of the leaf gives negative starch test and does not become blue-black in iodine solution. This experiment proves the necessity of light for photosynthesis.
Sunlight provides the energy needed for photosynthesis to take place. In this process carbon dioxide and water are converted into oxygen (a waste product that is released back into the air) and glucose (the source of energy for the plant).
Answer:
These are the conditions necessary for photosynthesis:
Sunlight
Chlorophyll,
Carbon Dioxide
Water
