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Biology · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q16
Assertion (A): The pyramid of biomass in a pond aquatic ecosystem is always inverted. Reason (R): The biomass of consumers like fishes far exceeds…
Assertion (A) : The pyramid of biomass in a pond aquatic ecosystem is always inverted.
Reason (R) : The biomass of consumers like fishes far exceeds that of the producers like phytoplanktons.
Official answer
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.