BI-2126
Factors affecting photosynthesis
Biology · Secondary 4 · Hard · Factors affecting photosynthesis
In an investigation on photosynthesis, a student measured the number of oxygen bubbles released per minute by a pond plant at different light intensities. When the light intensity was doubled from 200 to 400 units, the rate of bubble production increased from 10 to 20 bubbles per minute. Which conclusion about the effect of light intensity on the rate of photosynthesis is most appropriate?
- Light intensity has no effect on the rate of photosynthesis.
- The rate of photosynthesis is directly proportional to light intensity in this range.
- The plant has reached its maximum rate of photosynthesis at 200 units.
- Oxygen bubbles cannot be used to measure the rate of photosynthesis.
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