BI-1998
Factors affecting photosynthesis
Biology · Secondary 4 · Hard · Factors affecting photosynthesis
A student shines light of increasing intensity on a plant and measures the rate of photosynthesis. At first the rate increases, then becomes constant even when light intensity is raised further. What is the most likely explanation?
- Another factor such as carbon dioxide concentration has become limiting
- The chlorophyll in the leaves has been used up
- Light intensity can never affect the rate of photosynthesis
- The plant has stopped absorbing water from the soil
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