BI-2087
Factors affecting photosynthesis
Biology · Secondary 4 · Hard · Factors affecting photosynthesis
A plant is kept at a constant light intensity and carbon dioxide concentration. Its rate of photosynthesis is measured at 10 °C and then at 30 °C. The rate is higher at 30 °C. Which statement best explains this change?
- Enzymes in photosynthesis collide with substrates more frequently at 30 °C, increasing the rate of reaction.
- Chlorophyll absorbs more light energy at 30 °C than at 10 °C.
- The concentration of carbon dioxide in the air is higher at 30 °C than at 10 °C.
- The number of chloroplasts in each leaf cell increases when temperature increases.
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