This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 121 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 121 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A symbiotic relationship that benefits one species but harms the other A) Mutualism. B) Commensalism. C) Parasitism. D) None of above. Show Answer Correct Answer: C) Parasitism. 2. Biotic factors are ..... A) Non-living parts of an ecosystem. B) Living parts of an ecosystem. C) Things that once were alive, but now are dead. D) Not important parts of ecosystems. Show Answer Correct Answer: B) Living parts of an ecosystem. 3. Which type of squirrels introduced from America are now out-competing native red squirrels in the UK? A) Grey. B) Red. C) Silver. D) Brown. Show Answer Correct Answer: A) Grey. 4. This term means life/living things A) Bio-. B) Eu-. C) -Ology. D) Pro-. Show Answer Correct Answer: A) Bio-. 5. An organism that obtains energy by eating animals A) Carnivore. B) Herbivore. C) Omnivore. D) Plant. Show Answer Correct Answer: A) Carnivore. 6. Close, long-term relationship between two speices that usually involves an exchange of food and energy A) Symbiosis. B) Ecology. Show Answer Correct Answer: A) Symbiosis. 7. Trees and flowers are ..... A) Rubbish. B) Bins. C) Bottle. D) Plants. Show Answer Correct Answer: D) Plants. 8. Which nitrogen cycle process is occurring when bacteria convert ammonium to nitrite and then into nitrate? A) Nitrogen fixation. B) Nitrification. C) Denitrification. D) Ammonification. E) Assimilation. Show Answer Correct Answer: B) Nitrification. 9. The animal that is hunted for food A) Predation. B) Prey. C) Cooperation. D) Competition. Show Answer Correct Answer: B) Prey. 10. Grass is considered a ..... A) Consumer. B) Producer. C) Decoposer. D) Composers. Show Answer Correct Answer: B) Producer. 11. Why do deep water ecosystems tend to have low biodiversity? A) They are unstable and constantly changing. B) They are too stable and do not change. C) They have extreme conditions. D) They have moderate conditions. Show Answer Correct Answer: C) They have extreme conditions. 12. A bird's habitat is ..... A) Prey of an owl. B) Omnivore. C) A nest in a tree. D) Predator of a worm. Show Answer Correct Answer: C) A nest in a tree. 13. What is an invasive species? A) An organism that IS native to an area and causes harm to the environment/humans. B) An organism that is NOT native to an area and causes harm to the environment/humans. C) An organism that is NOT native to an area and helps the environment/humans. D) An organism that IS native to an area and helps the environment/humans. Show Answer Correct Answer: B) An organism that is NOT native to an area and causes harm to the environment/humans. 14. What will happen to the population if the immigration and emigration are equal and the birth and death rate are equal A) Greater chance the population would decrease. B) Greater chance the population would increase. C) Nothing. D) None of above. Show Answer Correct Answer: C) Nothing. 15. Eats dead organisms and returns nutrients to soil A) Autotroph. B) Decomposer. C) Biomass. D) Carnivore. Show Answer Correct Answer: B) Decomposer. 16. All the living AND non-living things in an area make up a(n) ..... A) Community. B) Population. C) Ecosystem. D) Biosphere. Show Answer Correct Answer: C) Ecosystem. 17. The organism that gets eaten is called ..... A) Predator. B) Prey. C) Competition. D) Snails. Show Answer Correct Answer: B) Prey. 18. Animals that live permanently in the soil and spend their entire development cycle in the soil A) Nekton. B) Plankton. C) Geobiont. D) Benthos. E) A parasite. Show Answer Correct Answer: C) Geobiont. 19. This type of succession occurs after a forest fire A) Primary succession. B) Secondary succession. C) Both. D) None of above. Show Answer Correct Answer: B) Secondary succession. 20. This type of consumer eats only plants. A) Omnivore. B) Herbivore. C) Carnivore. D) Producer. Show Answer Correct Answer: B) Herbivore. ← PreviousNext →Related QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9Ecology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books