Online MCQs Test – Man and His Environment – Biology 10th

1. The elements in the ecosystem recycle through organisms with the environment is called:

2. One of the important constituent of protein and DNA.

3. The growth and life processes of living organisms require about:

4. The cold war between the organisms of a community occupying the same habitat is called:

5. The main cause of acid rain is:

6. An area where community interacts with non-living environment is called:

7. Main cause of depletion of the ozone layer is the CFC used as the propellant in:

8. Enzyme activities of metabolic reactions are also altered with the changes in:

9. The decomposed dead animals and plants called:

10. The amount of solid waste or concentration of gases other than oxygen increase in the atmosphere is called:

11. Presentation of a number of individuals or amount of biomass or energy in various trophic levels from lower to a higher level is:

12. Any biological region recognized by its climate or vegetation is called:

13. In a given ecosystem various food chains are linked together and interact with each other to form a complete network called:

14. Competition between the members of different species is:

15. All the life on the earth is based on:

16. The term describes how the ecosystem is organized in a state of stability where species exist with other species and the environment.

17. The transfer of food material from producers through some organisms with repeated eating and being eaten is called:

18. Process of converting nitrogenous compound into free nitrogen called:

19. Respiration consumes it for the combustion of food for release of energy.

20. It is an essential constituent of protein.