problem1) Answer all the problems:

i)  Define population and prepare down its characteristics.

ii) What do you mean by homeostasis of an ecosystem?

iii) Describe lithosphere and stratosphere.

iv) prepare a short note on “Bhopal Gas Tragedy” and its adverse effects on human race.

problem2) Draw a labelled diagram for N2 cycle and give its importance.

problem3) Describe the different methods of detection and measurement of air pollution.

problem4) Briefly describe the role of governmental and nongovernmental agencies for environmental protection.