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Biology · 2025 · 2 marks
CBSE 2025 · Region 2 · Set 1 · Q21
Student to attempt either option (A) or (B). (A) Identify the type of pyramid given below and write two identifying features of such a pyramid:
Student to attempt either option (A) or (B).
Identify the type of pyramid given below and write two identifying features of such a pyramid :
(i)
Construct an ideal pyramid of energy when $\displaystyle 10,00,000$ Joules of sunlight is available.
(ii)
Mention the energy obtained by the fourth level of this pyramid.
Marking-scheme solution
Expanding age pyramid.
The number of individuals in the pre-productive age group is more than that in the reproductive age group,
Number of Post reproductive individuals are less than reproductive individuals.
(i)
(ii)
10J
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.