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Question Krishna set-up an experiment with two potted plants of same size and placed one of them in sunlight and the other in a dark room, as shown in Fig. 10.10.
Fig. Experimental pots, (a) Sunlight (b) Complete dark
Answer the following questions.
(i) What idea might she be testing through this experiment?
Through this experiment, she is testing whether sunlight is necessary for photosynthesis in plants or not. (ii) What are the visible differences in plants in both the conditions? Answer: The plant kept in sunlight looks healthy and green as it performs photosynthesis while the plant kept in the dark room looks weak, pale, and yellowish because it cannot perform photosynthesis properly. (iii) According to you, leaves of which plants confirm the iodine test for the presence of starch? Answer: The leaves of the plant kept in sunlight will confirm the iodine test for starch.