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Questions  

 CO2 saturation point for C3 plants (A) and C4 plants (B) is 
 

 AB
1.360 μL/L450 μL/L
2.450 μL/L360 μL/L
3.250 μL/L150 μL/L
4.360 μL/L650 μL/L

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detailed solution

Correct option is B

CO2 saturation point is higher for C3 plants than C4 plants.  C4 plants show saturation at about 360 µlL-1 while C3 responds to increased CO2 concentration and saturation is seen only beyond 450 µlL-1.

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