CBSE 2026 · Region 3 · Set 3 · Q14 · 1 mark
Assertion (A) : Net Primary Productivity (NPP) is always less than Gross Primary Productivity (GPP).
Reason (R) : A portion of Gross Primary Productivity (GPP) is used by plants for respiration.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
EcosystemProductivityUnderstandassertion_reasoneasy
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.