This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 42 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which gas in the atmosphere causes acid rain?Tick ONE box. A) Carbon monoxide. B) Oxygen. C) Ozone. D) Sulfur dioxide. Show Answer Correct Answer: D) Sulfur dioxide. 2. A secondary succession is formed: A) On an existing succession that has suffered disruptions from natural causes. B) On an existing succession that has not suffered disruptions from natural causes. C) On a primary succession that has not suffered disruptions from natural causes. D) On a secondary succession that has suffered disruptions from natural causes. Show Answer Correct Answer: A) On an existing succession that has suffered disruptions from natural causes. 3. Elephants A) Forest ecosystem. B) Desert ecosystem. C) Mangrove ecosystem. D) No answer. Show Answer Correct Answer: A) Forest ecosystem. 4. Prey, other species, and plants are ..... factors. A) Abiotic. B) Biotic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Biotic. 5. How do humans affect ecosystems? A) By creating more natural habitats. B) By reducing the use of chemicals. C) By habitat loss, overuse of resources, introduction of species to a new area, overuse of chemicals such as fertilizer. D) By increasing biodiversity. Show Answer Correct Answer: C) By habitat loss, overuse of resources, introduction of species to a new area, overuse of chemicals such as fertilizer. 6. What is a feature of shorter wavelength radiation? A) It is the type emitted by the Sun. B) It has less energy per photon than longer wavelengths. C) It is absorbed by greenhouse gases. D) It is reflected by chlorophyll. Show Answer Correct Answer: A) It is the type emitted by the Sun. 7. What is the function of rybosomes? A) Store and regulate DNA. B) Organizing microtubules that serve as the cell's skeletal system. C) Store nutrients and water. D) Protein synthesis. Show Answer Correct Answer: D) Protein synthesis. 8. ..... :Nonliving things in an ecosystem (air, soil, water, sunlight) A) Abiotic Factors. B) Biotic Factors. C) All the above. D) None of the above. Show Answer Correct Answer: A) Abiotic Factors. 9. True or False:Humans have no impact on the environment and do not impact succession. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. All are considered to be abiotic factors EXCEPT A) Moisture. B) Air currents. C) Predators. D) Temperature. Show Answer Correct Answer: C) Predators. 11. What is a density-dependent factor? A) Affects all populations equally. B) Stronger as population gets larger. C) Caused only by weather. D) Affects only small populations. Show Answer Correct Answer: B) Stronger as population gets larger. 12. These interactions are called: A) Limiting factors. B) Community interactions. C) Population growth. D) Trophic levels. Show Answer Correct Answer: B) Community interactions. 13. Without plants we would have no animals. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. What makes two species that use similar resources not compete? A) Both of them migrate out of season. B) Options b) or c) come about. C) One of them migrates out of season. D) They have different ecological niches. Show Answer Correct Answer: D) They have different ecological niches. 15. An area characterized by specific plants and animals. A) Biome. B) Longitude. C) Eutrophication. D) Habitat Fragmentation. Show Answer Correct Answer: A) Biome. 16. Which of the following statements regarding food webs is true? A) Several species of primary consumers may feed on the same species of producer. B) A consumer eats only one type of producer. C) Detritivores consume dead organic matter from a specific trophic level. D) Nutrient transfer moves from producer to consumer and back. Show Answer Correct Answer: A) Several species of primary consumers may feed on the same species of producer. 17. Small consumers that are hunted and eaten by larger consumers A) Producer. B) Prey. C) Predator. D) None of the above. Show Answer Correct Answer: B) Prey. 18. Which principle states that no two species can occupy exactly the same niche in the same habitat at the same time? A) Symbiotic inclusion principle. B) Symbiotic exclusion principle. C) Competitive inclusion principle. D) Competitive exclusion principle. Show Answer Correct Answer: D) Competitive exclusion principle. 19. Cellular respiration happens in the ..... A) Chlorophyll. B) Mitochondria. C) Chloroplast. D) None of the above. Show Answer Correct Answer: B) Mitochondria. 20. Which is an example of a consumer eating another consumer in an ocean ecosystem? A) A fish eating algae. B) A shark eating a tuna. C) A sea turtle eating sea grass. D) A sea worm eating dead animals. Show Answer Correct Answer: B) A shark eating a tuna. 21. Carbon dioxide for photosynthesis comes from A) The air. B) The soil. C) The stem. D) The sun. Show Answer Correct Answer: A) The air. 22. Bacteria A) Biotic. B) Abiotic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Biotic. 23. What term used for the range of external conditions within which a species can survive and reproduce? A) Pioneer species. B) Resilience. C) Camouflage. D) Tolerance. Show Answer Correct Answer: D) Tolerance. 24. What does an organism's niche describe? A) Population size. B) The organism's role, including habitat, food, and interactions. C) Number of predators. D) Genetic makeup. Show Answer Correct Answer: B) The organism's role, including habitat, food, and interactions. 25. Mountains, ocean floors and the rest of the Earth's solid landscape make up which of Earth's spheres? A) Atmosphere. B) Lithosphere. C) Hydrosphere. D) Biosphere. Show Answer Correct Answer: B) Lithosphere. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 14 Ecosystem Quiz 1Class 12 Biology Chapter 14 Ecosystem Quiz 2Class 12 Biology Chapter 14 Ecosystem Quiz 3Class 12 Biology Chapter 14 Ecosystem Quiz 4Class 12 Biology Chapter 14 Ecosystem Quiz 5Class 12 Biology Chapter 14 Ecosystem Quiz 6Class 12 Biology Chapter 14 Ecosystem Quiz 7Class 12 Biology Chapter 14 Ecosystem Quiz 8Class 12 Biology Chapter 14 Ecosystem Quiz 9Class 12 Biology Chapter 14 Ecosystem Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books