A student is performing an experiment to show that sunlight is necessary for photosynthesis. In the first stage, he keeps a potted plant with green leaves in a dark place for about 3 days. Towards the end of the experiment, he boils one leaf in alcohol before using iodine for testing starch.(a) Why is the plant kept in a dark place for about 3 days?(b) Why is the leaf boiled in alcohol before testing for starch with iodine?

A student is performing an experiment to show that sunlight is necessa

1.	A student is performing an experiment to show that sunlight is necessary for photosynthesis. In the first stage, he keeps a potted plant with green leaves in a dark place for about 3 days. Towards the end of the experiment, he boils one leaf in alcohol before using iodine for testing starch.(a) Why is the plant kept in a dark place for about 3 days?(b) Why is the leaf boiled in alcohol before testing for starch with iodine?
Answer» A student is performing an experiment to show that sunlight is necessary for photosynthesis. In the first stage, he keeps a potted plant with green leaves in a dark place for about 3 days. Towards the end of the experiment, he boils one leaf in alcohol before using iodine for testing starch. (a) Why is the plant kept in a dark place for about 3 days? (b) Why is the leaf boiled in alcohol before testing for starch with iodine?