Biology Ecosystem Test Online MCQs

1. Trophic levels are formed by:

2. 10 % law of energy transfer was given by

3. Which among the following is a rootless plant?

4. A lake with an inflow of domestic sewage rich in organic waste may result in

5. Mr. X is eating curd/yoghurt. For this food intake in a food chain Mr. X should be considered as occupying

6. Territoriality occurs as a result of

7. Food chain starts with

8. The symbiotic relationship of algae and fungus is found in

9. Flora and fauna in lake or ponds is

10. The food chain in which microbes breakdown energy rich compounds synthesized by producers is called

11. If the high altitude birds become rare or extinct,  the plants which may disappear along with them are

12. The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodule is  

13. An ecosystem, such as an aquarium, is self-sustaining if it involves the interaction between organisms, a flow of energy, and the presence of

14. Which one of the following is correct matching of a plan, its habit and forest type where it normally occurs?

15. Keystone species deserve protection because these