The atmospheric concentration of CO_2 at which photosynthesis just compensates for respiration is referred to as CO_2 compensation point. - Biology Assertion & Reasoning Biology | ExamTest.live

mediumAssertion & ReasoningBiologyBiology

1 mark

The atmospheric concentration of C O_{2} at which photosynthesis just compensates for respiration is referred to as C O_{2} compensation point.

A $The atmospheric concentration of C O_{2} at which photosynthesis just compensates for respiration is referred to as C O_{2} compensation point.$
B $The C O_{2} compensation point is reached when the amount of C O_{2} uptake is less than that generated through respiration because the level of C O_{2} in the atmosphere is more than that required for achieving C O_{2} compensation point.$

Solution & Step-by-step Explanation

At very low C O_{2} concentrations, photosynthesis is strongly limited, while respiratory rates are unaffected, resulting in a negative balance between C O_{2} fixed by photosynthesis and C O_{2} produced by respiration. By increasing the atmospheric concentration of C O_{2}, a point is reached where photosynthesis just compensates for respiration; this is known as the C O_{2} compensation point. The reason provided is false because at the compensation point, C O_{2} uptake equals C O_{2} generation, not being less than it.

Try it yourself before checking the explanation above.

The atmospheric concentration of C O_{2} at which photosynthesis just compensates for respiration is referred to as C O_{2} compensation point.

Assertion (A)

The atmospheric concentration of C O_{2} at which photosynthesis just compensates for respiration is referred to as C O_{2} compensation point.

Reason (R)

The C O_{2} compensation point is reached when the amount of C O_{2} uptake is less than that generated through respiration because the level of C O_{2} in the atmosphere is more than that required for achieving C O_{2} compensation point.

Practice with timed mock tests and track your performance across Biology.