- A The seed coat formed later from the hardened outer integument layers of the ovule
- B The megasporangium (diploid tissue surrounding and nourishing the megaspore/embryo sac)
- C The embryo that develops only after double fertilization of the egg has occurred
- D The endosperm tissue that forms from the fertilized central cell after fertilization
Correct answer: B. The megasporangium (diploid tissue surrounding and nourishing the megaspore/embryo sac)
Explanation: Nucellus: the megasporangium of the seed plant ovule. Diploid tissue that surrounds the female gametophyte (embryo sac). Provides nutrients and physical support. Homologous to sporangium wall.
Concept context
Flower structure, pollination, double fertilization, and seed/fruit development — the highest-scoring Class 12 biology chapter in NEET.
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