Man and His Environment – Online MCQs – Biology 10th

1. Bacteria and fungi are:

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

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

4. The decomposed dead animals and plants called:

5. The group of organisms that belongs to the same species live in a particular area called:

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

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

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

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

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

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

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

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

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

15. It is an essential constituent of protein.

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

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

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

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

20. Acid rain causes damage to: