Illustrate pollination in vallisneria

Wind pollination is common in grasses and water pollination in vallisneria. Give the features of these plants to facilitate pollination.

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

Illustrate coupling reaction with example.

When the pollen is transferred from anther to the stigma of same flower, the pollination is called autogamy. Geitonogamy is functionally cross pollination, but genetically similar to autogamy. Justify the statement.

Wind pollination is common in

Flowering plants have major devices to discourage self pollination and to increase cross pollination. Point out any four devices.