An experiment to show carbon dioxide is necessary for photosynthesis
(i) A potted plant is kept in the dark for 24 hours to remove starch from its leaves.
(ii) one its leaves is enclosed in a conical flask containing potassium hydroxide and another in a flask containing water as shown in the figure below
- The plant is then placed in sunlight for 3 hour.
- Each of the two leaves is tested for the presence of starch.
- The leaf in a flask that contained potassium hydroxide solution does not contain starch because potassium absorbed carbon dioxide which was necessary for photosynthesis.
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CATEGORIES o level biology revision questions
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