With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1. | Increasing atmospheric CO2 concentration up to 0.05% can enhance the CO2 fixation rate |
2. | C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum |
3. | Tomato is a greenhouse crop that can be grown in CO2 enriched atmosphere for higher yield |
4. | Light saturation for CO2 fixation occurs at 10% of full sunlight |
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