31.Which of the following are true of fertillizer ? 1. It supplies nutrients to the plants. 2. It kills the pests. 3. It produces plant growth hormones. 4. It adjusts the soil pH and increases the crop yield.

32.Which plant is used in the treatment of blood perssure ?

33.Ionising radiations are used in

34.Aspirin is the common name of

35.If the length of the filament in an electric bulb is reduced, the latter will glow with intensity that is