- A Female gametophytes housed within the megasporangium
- B Male gametophytes (pollen grains containing the male gametes)
- C Sporophytes directly, bypassing the gametophyte generation
- D Embryos formed without any intervening fertilization step
Correct answer: B. Male gametophytes (pollen grains containing the male gametes)
Explanation: Heterospory: two types of spores. Microspores (small) → male gametophyte (pollen grain). Megaspores (large) → female gametophyte (embryo sac). Evolved in seed plants.
Concept context
Flower structure, pollination, double fertilization, and seed/fruit development — the highest-scoring Class 12 biology chapter in NEET.
Read the full Sexual Reproduction in Flowering Plants notes →