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Biology · 2026 · 2 marks
CBSE 2026 · Region 1 · Set 1 · Q18
(a) (i) How does a farmer use dormancy of seed to his advantage? (ii) Differentiate between pea seed and castor seed.
(a)(i)
How does a farmer use dormancy of seed to his advantage?
(ii)
Differentiate between pea seed and castor seed.
OR
(b)
Identify the stage of follicle where primary oocyte undergoes first meiotic division. Also mention the products of this division.
Marking-scheme solution
(i)
Dormancy is crucial for storage (dehydration) of seeds to be used to raise the crops in next season / Seeds are used as source of food / for commercial purpose
(ii)
| Pea seed | Castor seed |
| Non endospermic seed | Endospermic seed |
| Non-albuminous seed | Albuminous seed |
| No endosperm is left in the seed as it is fully consumed during embryo development. | It contains some amount of endosperm as it is not consumed completely during embryo development. |
(Any one difference)
• Tertiary follicle in the ovary
• Secondary oocyte and 1st polar body.
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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.