First slide

Pre-fertilisation : Structures and Events

Question

What type of pollination takes place in Vallisneria?

Easy

A

Pollination occurs in submerged condition by water
B

Flowers emerge above surface of water, and pollination occurs by insects
C

Flowers emerge above water surface, and pollen is carried by wind
D

Male flowers are carried by water currents to female flowers at surface of water

Solution

In Vallisneria, the female flower reaches the surface of water by the long stalk and the male flowers or pollen grains are released onto the surface of water. They are carried passively by water currents; some of them eventually reach the female flowers and the stigma.

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