Which would have the GREATEST effect on the rate of photosynthesis in a plant?
A oxygen level
B light intensity
C sugar concentration
D starch concentration
Which would have the GREATEST effect on the rate of photosynthesis in a plant?
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The correct answer is B light intensity.
Light intensity has the greatest effect on the rate of photosynthesis because it directly influences the amount of energy available for plants to convert carbon dioxide and water into glucose and oxygen. Higher light intensity typically increases the rate of photosynthesis, up to a certain point, after which other factors may become limiting.