Man and His Environment – Online MCQs – Biology 10th

1. All biogeochemical cycles are closely interlinked with:

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

3. Burning of fossil fuels results in:

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

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

6. Bacteria and fungi are:

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

8. The main cause of acid rain is:

9. The decomposed dead animals and plants called:

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

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

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

13. Competition between the members of different species is:

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

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

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

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

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

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

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