Write the two events involved in the sexual reproduction of a flowering plant.

i) Discuss the first event and write the types.

ii) Mention the advantages and the disadvantages of that event.

Two events involved in the sexual reproduction of a flowering plant are pollination and fertilization.

Pollination is the process of transfer of pollen from the anther to the stigma of the flower. It is of two types – Self-pollination and cross-pollination.

Self-pollination: - In self-pollination, pollen from the anther of one pollination lands on the stigma of same flower. It is also known as autogamy. E.g. Wheat, barley etc.

Advantages: - 1. Pollination does not depend on other agents.

2. no pollen wastage.

Disadvantage: - 1. No new variety.

2. new plants are weak.

Cross- pollination: - In cross-pollination pollen from anther of one flower lands on the stigma of another flower by the means of water or animals or wind. It is also known as allogamy. E.g. grasses etc.

Advantages: 1. Seeds are viable.

2. New varieties are produced.