Ecology Quiz 178 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Two animals, one benefits, the other is harmed or killed

Correct Answer: C) Parasitism.

2. It is estimated that humans will cause more than half of the existing species in the world to go extinct in the next ..... years

Correct Answer: B) 100.

3. What is the water cycle?

Correct Answer: B) The movement of water on, above, or below the surface of the Earth.

4. Humans influence the nitrogen cycle by:

Correct Answer: C) Using fertilizer.

5. Competition between same species is .....

Correct Answer: A) Infraspecific competition.

6. A group of very similar organisms that can mate and reproduce offspring of the same type

Correct Answer: C) Species.

7. This biome has lots of pressure, is dark and has many creepy fish and sea creatures .....

Correct Answer: D) Deep Ocean.

8. An organism that uses an outside source of energy like the sun to create energy-rich food molecules.

Correct Answer: B) Producer.

9. Demographic transition is change from high birthrates and high death rates to

Correct Answer: B) Low birthrates and low death rates.

10. Non-point source of pollution

Correct Answer: C) Nonpoint source of pollution.

11. A shrimp is warned of danger by a fish and the fish gets a home dug by the shrimp. Which type of symbiotic relationship is this?

Correct Answer: C) Mutualism.

12. In the ocean nitrogen is often the limiting nutrient. What does this term mean?

Correct Answer: B) Nitrogen is scarce or cycles very slowly through the ecosystem.

13. Where do all living things exist?

Correct Answer: C) Biosphere.

14. All the organisms of the same species living in the same place at the same time are called:

Correct Answer: A) Population.

15. Many biotic factors affect individuals in a population. An example of an organism being directly affected by a biotic factor is

Correct Answer: A) A squirrel cannot find a mate.

16. Cyles that recycle chemical elements and water needed by organisms

Correct Answer: A) Biochemical cycle.

17. What is likely to happen to the population of lions if the population of trees decrease

Correct Answer: B) They will decrease.

18. Seals eat fish. What would happen to the seal population if almost all of the fish died?

Correct Answer: B) The population would shrink.

19. What is an example of a legume?

Correct Answer: C) Peanuts.

20. In the rain forest this is a layer that makes up shorter trees and vines and is called the

Correct Answer: C) Understory.