In the context of the lab setup you described for photosynthesis using a water plant, the primary limiting factors that can impact the rate of photosynthesis include:
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Dissolved carbon dioxide concentration - Carbon dioxide is a critical raw material for photosynthesis, and its availability directly impacts the rate at which photosynthesis occurs.
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Light intensity - Light is essential for photosynthesis, and the intensity of light can significantly influence the rate of photosynthesis, as it affects the energy available for the process.
While dissolved glucose concentration and collected oxygen volume are results of photosynthesis, they do not limit the process itself. Instead, they are products or measures of the rate of photosynthesis.
Therefore, the primary limiting factors from your list are:
- Dissolved carbon dioxide concentration
- Light intensity