This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 207 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 207 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A group of deer, chipmunks, otters, and insects and their non-living surroundings is a(n) ..... A) Population. B) Organism. C) Community. D) Ecosystem. Show Answer Correct Answer: D) Ecosystem. 2. What is the definition of a population? A) All individuals of one kind living in one area. B) One single organism. C) Any living thing. D) Many different organisms living in one area. Show Answer Correct Answer: A) All individuals of one kind living in one area. 3. At niche..... A) Is the function that an organism performs in the food web of that community. B) Includes everything else the organism does and needs in its environment. C) Is specific to each individual animal and plant. D) All of the above. Show Answer Correct Answer: D) All of the above. 4. How is nitrogen "fixed" into a usable form for plants? A) Through action of bacteria only. B) Through lightning only. C) Through action of bacteria and lightning. D) Through photosynthesis. Show Answer Correct Answer: C) Through action of bacteria and lightning. 5. Given the food chain below, which organism occupies the third trophic level? Grass $\rightarrow$ grasshopper $\rightarrow$ mouse $\rightarrow$ snake A) Grasshopper. B) Mouse. C) Snake. D) Grass. Show Answer Correct Answer: B) Mouse. 6. Which feeds on nonliving organisms? A) Autotroph. B) Parasite. C) Heterotroph. D) Saprotroph. Show Answer Correct Answer: D) Saprotroph. 7. Where do consumers get energy? A) The sun. B) The water. C) Eating other organisms. D) Eating dirt. Show Answer Correct Answer: C) Eating other organisms. 8. In order for an ecosystem to remain stable there must b A) Drastic modifications to the environment. B) Interrelationships and interdependencies among organisms. C) Limited biodiversity. D) Gradual changes in the climate. Show Answer Correct Answer: B) Interrelationships and interdependencies among organisms. 9. Overpopulation is A) Having too many resources. B) Having an excessive amount of one species in a compact ecosystem (too many). C) How many organisms can live in the same space at one time. D) Something that stops population growth. Show Answer Correct Answer: B) Having an excessive amount of one species in a compact ecosystem (too many). 10. Which of these is NOT a common resource that determines how many individuals can survive in an environment A) Mates. B) Predators and Disease. C) Food and Water. D) Shelter. Show Answer Correct Answer: A) Mates. 11. Which of these food chains would be the most efficient? A) Producer > Primary consumer. B) Producer > Primary consumer > Secondary consumer > Tertiary consumer. C) Producer > Primary consumer > Secondary consumer. D) None of above. Show Answer Correct Answer: A) Producer > Primary consumer. 12. Something that is fragile or easily damaged. A) Delicate. B) Harmful. C) Disease. D) None of above. Show Answer Correct Answer: A) Delicate. 13. In a typical food chain, about what percentage of energy is passed on to the next trophic level? A) 1%. B) 10%. C) 25%. D) 15%. Show Answer Correct Answer: B) 10%. 14. Density-Independent factors ..... A) Any force that affects the size of a population of living things in response to the density of the population. B) Factors that occur regardless of how dense the population may be. Show Answer Correct Answer: B) Factors that occur regardless of how dense the population may be. 15. They prey is the one being A) Eatin. B) Hunting. C) Looking for. D) Hunted. Show Answer Correct Answer: D) Hunted. 16. In an ecosystem the energy flow is always A) Always unidirectional. B) Always bidirectional. C) In any direction. D) Always down directional. Show Answer Correct Answer: A) Always unidirectional. 17. Mistletoe extracts water and nutrients from the spruce tree to the tree's detriment (harm). A) Mutualism. B) Parasitism. C) Commensalism. D) None of above. Show Answer Correct Answer: B) Parasitism. 18. A group of similar ecosystems with the same general abiotic factors and primary producers. A) Biome. B) Climate. Show Answer Correct Answer: A) Biome. 19. Herbivores are which of the following? A) Producers. B) Secondary consumers. C) Primary consumers. D) Decomposers. Show Answer Correct Answer: C) Primary consumers. 20. Biological competition is ..... A) Organisms competing for different resources. B) Organisms competing for the same resources. C) Living things. D) Nonliving things. Show Answer Correct Answer: B) Organisms competing for the same resources. ← 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