What type of pollination takes place in Vallisneria?
Answer: (D) (D) Male flowers are carried by water currents to female flowers at surface of water. Answer: D.
- A.(A) Pollination occurs in submerged condition by water
- B.(B) Flowers emerge above surface of water, and pollination occurs by insects.
- C.(C) Flowers emerge above water surface, and pollen is carried by wind.
- D.(D) Male flowers are carried by water currents to female flowers at surface of water✓
Correct Answer
(D) (D) Male flowers are carried by water currents to female flowers at surface of water
Solution & Explanation
Answer: D. In Vallisneria (a water-pollinated plant), the female flower reaches the surface of water by a long stalk while the male flowers or pollen grains are released onto the water surface and are carried passively by water currents until some reach the female flowers and the stigma. Option D captures this; options A/B/C misstate the mechanism. NCERT: Ch 1, p.13, lines 36-39 — "In Vallisneria, the female flower reach the surface of water by the long stalk and the male flowers or pollen grains are released on to the surface of water. They are carried passively by water currents... some of them eventually reach the female flowers and the stigma."