Mohl's experiment demonstrates that...

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(A) Mohl's half-leaf experiment is a classic demonstration used to prove that $CO_2$ is essential for the process of photosynthesis.In this experiment

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Carbon dioxide is essential for photosynthesis.

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(A) Mohl's half-leaf experiment is a classic demonstration used to prove that $CO_2$ is essential for the process of photosynthesis.In this experiment,a part of a leaf is enclosed in a bottle containing $KOH$ (potassium hydroxide),which absorbs $CO_2$,while the other part remains exposed to the atmosphere.After some time,the leaf is tested for starch using iodine solution.The part of the leaf exposed to air turns blue-black (indicating the presence of starch),while the part inside the bottle remains pale (indicating no starch formation due to the absence of $CO_2$).

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