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

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

2. Conversion of atmospheric free nitrogen gas into nitrates called:

3. A kind of spiral-shaped bacteria, spirochaete, living between our teeth to obtain food is a good example of:

4. All biogeochemical cycles are closely interlinked with:

5. Burning of fossil fuels results in:

6. A bird that gets its energy and food when it eats grasshopper or caterpillar is:

7. It is an essential constituent of protein.

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

9. The area where an organism lives is called its:

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

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

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

13. Which of the following greenhouse gases is present in very high quantities?

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

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

16. The association between two different types of organisms which get benefit to each other, cannot live without each other is called:

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

18. The life-sustaining envelop of the earth is:

19. Acid rain causes damage to:

20. The main cause of acid rain is: