BI-2063
Factors affecting photosynthesis
Biology · Secondary 4 · Hard · Factors affecting photosynthesis
The graph shows the effect of increasing light intensity on the rate of photosynthesis of a plant at low and high carbon dioxide concentrations. At high light intensities, the curve for low carbon dioxide levels becomes flat while the curve for high carbon dioxide levels continues to rise. What does this show?
- At low light intensities, carbon dioxide is the limiting factor.
- At high light intensities, carbon dioxide is the limiting factor.
- When carbon dioxide concentration is high, there is no limiting factor.
- When carbon dioxide concentration is low, the plant cannot photosynthesise at all.
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