First slide

Pre-fertilisation : Structures and Events

Question

Which one of the following is correct for aquatic plants?

Easy

A

All aquatic plants use water for pollination.
B

Not all aquatic plants use water for pollination.
C

Vallisneria flowers are pollinated by water under the water surface.
D

Zostera is a freshwater plant.

Solution

Some examples of water pollinated plants are Vallisneria and Hydrilla which grow in fresh water and several marine sea-grasses such as Zostera. Not all aquatic plants use water for pollination. In a majority of aquatic plants such as water hyacinth and water lily, the flowers emerge above the level of water and are pollinated by insects or wind as in most of the land plants. 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.

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