The plant parts which consist of two generations one within the other: (a) Pollen grains inside the anther (b) Germinated pollen grain with two male gametes (c) Seed inside the fruit (d) Embryo sac inside the ovule (A) (c) and (d) (B) (a) and (d) (C) (a) only (D) (a), (b) and (c) (NEET 2020)
Answer: (B) (B) (a) and (d). Answer: B.
- A.(A) (c) and (d)
- B.(B) (a) and (d)✓
- C.(C) (a) only
- D.(D) (a), (b) and (c)
Correct Answer
(B) (B) (a) and (d)
Solution & Explanation
Answer: B. The phrase 'two generations one within the other' means a gametophyte generation enclosed within a sporophyte generation. (a) Pollen grains (the male gametophyte) lie inside the anther (sporophytic) and (d) the embryo sac (the female gametophyte) lies inside the ovule (sporophytic) — both are gametophyte-within-sporophyte, so both qualify. (b) is only the male gametophyte (no enclosing sporophyte) and (c) seed inside fruit is sporophyte within sporophyte. Therefore (a) and (d) is correct. NCERT: Ch 1, p.5, line 13 (pollen grains as male gametophyte) and p.9, lines 17-18 — "Located in the nucellus is the embryo sac or female gametophyte. An ovule generally has a single embryo sac formed from a megaspore."