BI-918
Factors affecting photosynthesis
Biology · Secondary 3 · Hard · Factors affecting photosynthesis
A student shines light of different intensities on a plant and measures the rate of photosynthesis. At low light intensity the rate is low, but it increases and then levels off even when light intensity continues to increase. What is the best explanation for the plateau?
- The plant has used up all its chlorophyll.
- Light intensity is still the limiting factor.
- Another factor such as carbon dioxide or temperature is limiting.
- Photosynthesis stops completely at high light intensity.
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