What is atmosphere? Give its major division.

(a) What is termed as 'breath of life' ? (b) What is atmosphere ? List its four main concentric layers. ( c) Give three important aspects of atmospere.

What is cancer? Give its major types and treatment.

What is atmosphere ? Name its different layers.

What is fishery? Name its divisions.

What is electrophoresis give its application give its application ?

What are the two major divisions of human neural system?