Draw a neat labelled diagram of T.S of mature anther.

Stamen is a male-fertilising organ in a flower that constitutes anther and a filament. The anther contains four saclike structures called microsporangia that produce pollens for pollination.

Write two points of differences between anemophilous and entomophilous flowers.

Feature Anemophilous flowers Entomophilous flowers Pollinating agent Anemophilous flowers are pollinated by the agency of wind. In entomophilous flower, the pollen grains are transferred from the anther of the stamen to the stigma of the pistil by the help of insects. Feature Anemophilous flowers Entomophilous flowers Adaptation Anemophilous flowers produce light-weighted and non-sticky pollen grains for the easy transport through wind. These do not produce nectar. Entomophilous flowers produce sticky pollen grains. These produce nectar for attracting the insects.

Draw a neat labelled diagram of the structure of typical bisexual flower.

A typical flower has four parts: calyx, corolla, androecium and gynoecium. Calyx and corolla are sterile parts and these are known as accessory whorls.The androecium and gynoecium directly take part in reproduction and hence, these are known as essential or reproductive whorls. If all these four parts are present, the flower is known as complete, but if any of these four parts is absent, the flower is termed as incomplete.