Explain how some plants are adapted for achieving pollination through wind. How! Vallisneria and seagrasses achieve pollination.

Explanation

In Vallisneria, the female flower reaches 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 where some of them eventually reach the female flowers and the stigma.
In water pollinated plants such as seagrasses, female flowers remain submerged in water and the pollen grains are released inside the water. Pollen grains in many such species are long, ribbon like and they are carried passively inside the water, some of them reach the stigma and achieve pollination.