Biology for IGCSE & O level - Plant Nutrition (Section 7 - No. 37)
How does the concentration of carbon dioxide affect photosynthesis?
Increases the rate of photosynthesis up to a point.
Always increases the rate of photosynthesis.
Decreases the rate of photosynthesis.
Has no effect on photosynthesis.
Explanation
CO2 is a substrate, so it increases the rate up to a certain level.
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