Given alongside is a sketch of a leaf partially covered with black paper and which is to be used in the experiment to show that light is compulsory for the process of photosynthesis. At the end of the experiment, which one of the leaf parts labelled I, II and III will become blue black when dipped in iodine solution?
(1) I only
(2) II only
(3) I and III
(4) II and III
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Answer:
i and iii part of the leave
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