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Science · 2025 · 1 mark
CBSE 2025 · Region 4 · Set 1 · Q19
Assertion (A): In reptiles, the temperature at which the fertilized eggs are kept decides the sex of the offsprings. Reason (R): Sex is not…
Assertion (A) : In reptiles, the temperature at which the fertilized eggs are kept decides the sex of the offsprings.
Reason (R) : Sex is not genetically determined in some animals.
Official answer
(A)
Both, Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.