Biology Ecosystem Test Online MCQs

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

2. Territoriality occurs as a result of

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

4. Which part of the world has a high density of organism?

5. Which one of the following is a matching pair of certain organism(s) and the kind of association?  

6. Mycorrhiza help in absorption of

7. The great barrier reef along the east coast of Australia can be categorized as

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

9. Keystone species deserve protection because these

10. Which one of the following correctly represents an organism and its ecological niche?

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

12. Abundance of a species in a population, within habitat is called

13. A lizard-like member of reptila is sitting on a tree with its tail coiled around a twig. This animal could be

14. Given below is one of the types of ecological pyramids. This type represents

15. Trophic levels are formed by: