A plant is kept in the dark for two days. A leaf is used in an experiment to investigate effect of two factors on photosynthesis as shown in the diagram. What are the colours of Q and R , when the leaf is tested for starch, using iodine solution?
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Explanation:
After the experiment, when the leaf us tested for starch using iodine solution, the Q part will be a bluish black, indicating the presence of starch. Explanation: However, the R portion will be brown in colour, since that part was not exposed to either sunlight or carbon dioxide.
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