Give any two ways by which diarrhoea can be controlled.

What is rancidity ? Mention any two ways by which rancidity can be prevented.

Is there any device by which direct current can be controlled without any loss of energy ? Can a choke coil do so?

Why is making cells competent essential for biotechnology experiments? List any two ways by which this can be achieved.

why is making cells competent essential for biotechnology experiments? List any two ways by which this can be achieved.

What do you mean by rancidity? Mention any two ways by which rancidity can be prevented.

State any two ways by which food can be preserved.

State two ways by which rusting can be prevented.

Give any two ways in which biodgradable substance would affect the enviroment?