This quiz works best with JavaScript enabled. Home > Science > Earth > Ecology – Quiz 159 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 159 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which statement concerning an ecosystem is correct? A) It can exist with or without a constant source of energy input. B) It must contain consumers but can exist without producers. C) It involves interactions between biotic and abiotic factors. D) It can exist on land, but it cannot exist in lakes, rivers, or oceans. Show Answer Correct Answer: C) It involves interactions between biotic and abiotic factors. 2. What is at the bottom of the food chain? A) Primary producers. B) Primary consumers. C) Secondary consumers. D) Tertiary consumers. Show Answer Correct Answer: A) Primary producers. 3. If one species in a food chain dies out, what can happen to the species that depend on it? A) They may die out as well. B) They will be better off. C) They will always find new food. D) None of above. Show Answer Correct Answer: A) They may die out as well. 4. The organisms that convert solar energy and raw materials into food are: A) Producers. B) Consumers. C) Herbivores. D) Decoposer. Show Answer Correct Answer: A) Producers. 5. Which of the following organisms are typical decomposers? A) Grasses and ferns. B) Bacteria and mushrooms. C) Mice and deer. D) Lions and snakes. Show Answer Correct Answer: B) Bacteria and mushrooms. 6. The scientist who introduced the term "Ecology" first: A) E. Suess. B) E. Haeckel. C) V.N.Vernadsky. D) K. Radkevich. E) Fredericks. Show Answer Correct Answer: B) E. Haeckel. 7. Consumes wastes and dead organisms A) Decomposers. B) Consumers. C) Prey. D) Predator. Show Answer Correct Answer: A) Decomposers. 8. Deforestation does not cause animals to lose their habitats. A) True. B) False. Show Answer Correct Answer: B) False. 9. Silverfish live and hunt with army ants. They share the prey. They neither help nor harm the ants. A) Mutualism. B) Parasitism. C) Commensalism. D) None of above. Show Answer Correct Answer: C) Commensalism. 10. Limiting factors which impact the size of a population no matter how large that population is. A) Density Independent Limiting Factors. B) Density Dependent Limiting Factors. C) Carrying Capacity. D) Exponential Growth. Show Answer Correct Answer: A) Density Independent Limiting Factors. 11. What do we call organisms that can make their own food? A) Autotrophs. B) Heterotrophs. C) Carnivores. D) Omnivores. Show Answer Correct Answer: A) Autotrophs. 12. Which of the following are all biotic? A) Temperature, Light, Rain, Gravity, Heat. B) Water, Fish, Insects, Lily Plants. C) Dogs, Meat, Cats, Catnip. D) Lion, Pride Rock, Warthog, Meerkat. Show Answer Correct Answer: C) Dogs, Meat, Cats, Catnip. 13. All ecosystems begin with the ..... A) Animals. B) Renewable resource. C) Plants. D) Sun. Show Answer Correct Answer: D) Sun. 14. Population Density:definition A) Calculated by dividing the number of individuals in a population by the unit area. B) Calculated by dividing the number of different populations by the unit area. C) Calculated by dividing the number of individuals in a community by the unit area. D) Calculated by dividing the number of individuals in an ecosystem by the unit area. Show Answer Correct Answer: A) Calculated by dividing the number of individuals in a population by the unit area. 15. The following are part of the carbon cycle EXCEPT ..... A) Respiration. B) Precipitation. C) Decomposition. D) Photosynthesis. Show Answer Correct Answer: B) Precipitation. 16. Incomplete combustion is combustion A) (CO) does not produce carbon monoxide. B) .It was turned off in the middle of the process. C) In conditions where there is an excess of oxygen. D) In conditions where there is a lack of oxygen. Show Answer Correct Answer: D) In conditions where there is a lack of oxygen. 17. How many species are found in a population? A) One. B) Five. C) Ten. D) No Limit. Show Answer Correct Answer: A) One. 18. What percentage of energy is passed on to each tropic level? A) 10%. B) 50%. C) 90%. D) 100%. Show Answer Correct Answer: A) 10%. 19. Feed on both producers and consumers A) Herbivore. B) Carnivore. C) Omnivore. D) Scavenger. Show Answer Correct Answer: C) Omnivore. 20. The first trophic level of an ecosystem consists of: A) Plants. B) Herbivores. C) Carnivores. D) None of above. Show Answer Correct Answer: A) Plants. ← PreviousNext →Related QuizzesScience QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books