Read following statements about Hydrophily.
(i) In majority of water plants, pollination is done by insects and air.
(ii) In Vallisneria pollination occur beneath the surface of water
(iii) Well developed non-essential whorls are present
(iv) Stalk of female flower shows coiling in Vallisneria

Q.

Which of the following statements is/are correct for hydrophily?

(i) Pollination by water is rare in flowering plants and is limited mostly to monocotyledons.

(ii) In majority of aquatic plants such as water hyacinth and water lily pollination takes place by insects and winds.

(iii) In most of the water pollinated species pollen grains are protected from getting wet by a mucilaginous covering.

(iv) In Vallisneria, female flowers reach the surface of water and receive the pollen grains, whereas in Zostera, female flowers remain submerged and receive pollen grains under water.

Q. Which statements among the following are true?

i. Water pollinated plants are Vallisneria, water lily, Zostera.
ii. Water pollination is mostly found in monocots and only in very few dicots.
iii. Majority of floating aquatic plants are insect or wind pollinated.
iv. Water pollinated plants produce nectar.

Q.

Which of the following statements is/are true for sexual reproduction in plants?

(i) Plants are obtained from seeds
(ii) Fertilisation can occur only after pollination
(iii) Two plants are always essential
(iv) Only insects are agents of pollination

Q. Which of the following characteristics indicates that a flower is hydrophilous?
(i) It produces pollen grains in large numbers.
(ii) Some pollen grains have specific gravity that is very similar to that of water.
(iii) Some plants have male flowers floating on the water surface till they meet the female flowers.
(iv) Vallisneria is a water-pollinated flower.

Q. The given figure shows the pollination by water in Vallisneria. Find out the correct matching.