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Carbon Dioxide Requirement in Photosynthesis

Carbon Dioxide Requirement in Photosynthesis

Experiment description

This experiment demonstrates that carbon dioxide is necessary for photosynthesis. Two similar plants are first kept in the dark to remove stored starch. Plant A is placed with potassium hydroxide to absorb carbon dioxide, while Plant B is kept without it. After keeping both in sunlight, only Plant B forms starch, proving that photosynthesis does not occur without carbon dioxide.