OUR ENVIRONMENT

1. The region of the world of living things is called __________ .

2. The living organisms maintain a balance with its ________________ factors.

3. ___________ is the main source of energy for all living organisms.

4. The position fit for animals in food web is called __________ .

5. _______________ (1927) showed tropical levels in the shape of ecological pyramid.

6. __________ is the main source of energy for an ecosystem.

7. Charles Elton put the __________ at the base and _________ at the tip of pyramid.

8. Energy flow from one organism to another shown in _____________ .

9. Population in food chain in each tropical level shown in ______________.

10. In an aquatic ecosystem the pyramid of biomass is _________.

11. The organic material produced during photosynthesis is called _________.

12. Biomass is also used as __________.

13. Flow of material between organism and environment is called ______________ or Bio geo chemical cycle.

14. Kolleru had been declared as bird sanctuary in ________.

15. The process of entry of pollutants into food chain is known as ______________.

16. The tendency of pollutants to concentrate as they more from one tropical level to the next is known as _______________.

17. Methyl mercury in food causes ____________ disease.