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

1. It is an essential constituent of protein.

2. All biogeochemical cycles are closely interlinked with:

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

4. The decomposed dead animals and plants called:

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

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

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

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

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

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

11. The main cause of acid rain is:

12. The main contributors of acid rain are:

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

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

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

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

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

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

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

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