Some marine animals and insects emit light from their body in darkness. This phenomenon is known as

Which one of the following processes in the bodies of living organisms is a digestive process?

In human body most of the digestive process, takes place in -

The process by which blood is purified in human body is called

Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition?

During normal respiration in a mammal, the diaphragm is