Ecology Quiz 114 (20 MCQs)

Quiz Instructions

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1. Which of the following is a density-independent limiting factor?

Correct Answer: C) Earthquake.

2. Living and non-living things in an area

Correct Answer: B) Ecosystem.

3. Producers are the .....

Correct Answer: C) First link in any food chain.

4. Climax stage of ecological succession is indicated that:

Correct Answer: A) Stable Community.

5. The term biomass refers to the total

Correct Answer: A) Dry mass of the organisms in a given area.

6. Feeding positions in a food chain or web

Correct Answer: B) Trophic level.

7. An organism that obtains energy by eating only plants

Correct Answer: B) Herbivore.

8. What kind of factor:flood?

Correct Answer: A) Density-independent.

9. Where an organism lives and all aspects of the environment.

Correct Answer: A) Habitat.

10. What is the range of physical and biological conditions in which species lives and the way the species obtain what is needed

Correct Answer: C) Niche.

11. What is the name of air pollution over a city?

Correct Answer: C) Smog.

12. Which of the following is NOT carried out by microorganisms in the nitrogen cycle?

Correct Answer: D) Absorption of nitrates.

13. A Remora fish swimming under a shark is an example of

Correct Answer: B) Commensalism.

14. 2 factors which increase population size

Correct Answer: A) Birth Rate, Immigration.

15. In an energy pyramid, which level has the most available energy?

Correct Answer: A) Producer level.

16. How does energy usually flow in ecosystems?

Correct Answer: B) From the Sun through producers to consumers.

17. The countryside is considered a ..... area.

Correct Answer: B) Rural.

18. Bacteria fix nitrogen from the atmosphere into a form plants can use.

Correct Answer: A) True.

19. The animal that is hunted and caught for food

Correct Answer: B) Prey.

20. What is an indicator species?

Correct Answer: B) A species that is sensitive to the environment.