Teaching UP TGT Mock Test Series 2025 Biology Plant Physiology Photosynthesis

Which of the following best describes the response of C3 plants to increasing CO2 concentration?

1
Saturation at 360 μl L⁻¹
2
Saturation at 450 μl L⁻¹ and beyond
3
Decrease in photosynthesis beyond 450 μl L⁻¹
4
No change in photosynthesis
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