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

1. The decomposed dead animals and plants called:

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

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

4. Acid rain causes damage to:

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

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

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

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

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

10. The group of populations that lives in a particular area of habitat and interacts with each other is called:

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

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

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

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

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

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

17. Competition between the members of different species is:

18. The main cause of acid rain is:

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

20. It is an essential constituent of protein.