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Photosynthesis In Higher Plants

Question
CBSEENBI11025065

Assertion : The atmospheric concentration of CO2 at which photosynthesis just compensates for respiration is referred to as CO2 compensation point. 

Reason : The CO2 compensation point is reached when the amount of CO2 uptake is less than that generated through respiration because the level of CO, in the atmosphere is more than that required for achieving CO2 compensation point.

  • If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

  • If both Assertion and Reason are true but the Reason is not the correct explanation of the assertion

  • If Assertion is true but Reason is false

  • If both Assertion and Reason are false

Solution

C.

If Assertion is true but Reason is false

A very low CO2 concentration photosynthesis is strongly limited by the low COwhile respiratory rates are unaffected. As a result, there is a negative balance between CO2 fixed by photosynthesis and CO2 produced by respiration and a net efflux of CO2 from the plant. By increasing the atmospheric concentration of CO2 at which photosynthesis just compensate for respiration is referred to as CO2 compensation point.