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

1. Process where the nitrogenous compound of living organism convert into nitrates is called:

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

3. Graphic presentation of members of the population in an area at different trophic levels is called

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

5. Bacteria and fungi are:

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

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

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

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

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

11. The main cause of acid rain is:

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

13. It is an association between the two organisms of different species which live together.

14. They are the primary source of energy for other organisms.

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

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

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

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

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

20. Growth of algae with very high rate due to increase in phosphorous and nitrogen-containing compounds called: