BI-1997
Factors affecting photosynthesis
Biology · Secondary 4 · Medium · Factors affecting photosynthesis
A student investigates how light intensity affects the rate of photosynthesis in an aquatic plant by counting bubbles of oxygen released per minute. When the lamp is moved from 80 cm to 40 cm from the plant, the number of bubbles per minute doubles. What is the most reasonable conclusion?
- Light intensity has no effect on photosynthesis.
- The rate of photosynthesis halves when light intensity increases.
- The rate of photosynthesis doubles when light intensity increases in this range.
- The plant stops photosynthesising at higher light intensity.
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