This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are secondary consumers in a food chain? A) Birds. B) Plants. C) Worms. D) Seeds. Show Answer Correct Answer: A) Birds. 2. Which of the following ecosystems is TERRESTRIAL? A) Wetlands. B) Oceans. C) Lakes and Ponds. D) None of the above. Show Answer Correct Answer: A) Wetlands. 3. What is the role of nitrogen-fixing bacteria in the nitrogen cycle? A) They convert nitrogen gas into usable forms for plants. B) They release nitrogen gas back into the atmosphere. C) They consume nitrogen from the soil. D) They protect plants from nitrogen overload. Show Answer Correct Answer: A) They convert nitrogen gas into usable forms for plants. 4. Lichens A) Forest ecosystem. B) Desert ecosystem. C) Mangrove ecosystem. D) No answer. Show Answer Correct Answer: B) Desert ecosystem. 5. What is the role of a producer in an ecosystem? A) Producers convert sunlight into energy through photosynthesis and form the base of the food chain. B) Producers convert air into energy through photosynthesis. C) Producers convert soil into energy through photosynthesis. D) Producers convert water into energy through photosynthesis. Show Answer Correct Answer: A) Producers convert sunlight into energy through photosynthesis and form the base of the food chain. 6. In a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks, the grasshoppers are A) Primary producers. B) Secondary producers. C) Primary consumers. D) Secondary consumers. Show Answer Correct Answer: C) Primary consumers. 7. Approximately how much energy is lost when moving up each trophic level? A) 70%. B) 90%. C) 50%. D) 10%. Show Answer Correct Answer: B) 90%. 8. Organisms that break down waste and dead organisms. A) Consumer. B) Decomposer. C) Producer. D) Detritus. Show Answer Correct Answer: B) Decomposer. 9. Which type(s) of cells have genetic material that is contained in a nucleus? A) Bacteria. B) Only animal cells. C) Protists. D) Both plant and animal cells. Show Answer Correct Answer: D) Both plant and animal cells. 10. What do animals in a food chain consume? A) Nutrients from the soil and water. B) Only other animals. C) Plants and other animals. D) Only plants. Show Answer Correct Answer: C) Plants and other animals. 11. Which biome is the Amazon part of? A) Taiga. B) Tundra. C) Rainforest. D) Desert. Show Answer Correct Answer: C) Rainforest. 12. Students wanted to investigate the distribution patterns of periwinkles and brown algae at various distances from the high tide mark on a rock platform. The best sampling technique would be: A) Point Sampling. B) Transect. C) Quadrats and Transect. D) Capture-Recapture. Show Answer Correct Answer: C) Quadrats and Transect. 13. ..... :a collection of all the organisms living in a particular place together with their abiotic components, such as water and air. A) Biosphere. B) Biome. C) Ecosystem. D) Community. Show Answer Correct Answer: C) Ecosystem. 14. A population is a group of organisms of the same species which live in different habitats A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 15. What does the term "aquatic" mean? A) Water-based ecosystem. B) Land-based ecosystem. C) All the above. D) None of the above. Show Answer Correct Answer: A) Water-based ecosystem. 16. Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the most likely outcome for the ecosystem? A) Biodiversity would decrease, and sustainability would decrease. B) Biodiversity would decrease, and sustainability would increase. C) Biodiversity would increase, and sustainability would increase. D) Biodiversity would increase, and sustainability would decrease. Show Answer Correct Answer: A) Biodiversity would decrease, and sustainability would decrease. 17. Carbon dioxide and water enter the environment when A) Fossil fuels are burned through combustion. B) Plants undergo photosynthesis. C) Rivers absorb gases. D) None of the above. Show Answer Correct Answer: A) Fossil fuels are burned through combustion. 18. T/F:Biodiversity is a good thing because it provides variety in an ecosystem. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. Primary Consumers are usually carnivores. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. Gases such as nitrogen, oxygen and carbon dioxide make up which of Earth's spheres? A) Atmosphere. B) Lithosphere. C) Hydrosphere. D) Biosphere. Show Answer Correct Answer: A) Atmosphere. 21. In Hawaii, there are volcanoes. Before anything was there, the volcanoes erupted which produced volcanic rock. Lichens were the first species to arrive, and they broke down the rock into soil. Eventually, plants began to grow. Now, the islands are functioning at their climax community.What is the pioneer species in this example? A) Shrubs. B) Lichens. C) Trees. D) Rock. Show Answer Correct Answer: B) Lichens. 22. What unique reproductive strategy do kangaroos have? A) Ability to pause the development of an embryo. B) Laying eggs like monotremes. C) Giving birth to fully developed joeys. D) Having multiple litters of joeys at the same time. Show Answer Correct Answer: A) Ability to pause the development of an embryo. 23. Which is an abiotic factor that influences the population of the rats? A) The amount of food available. B) The amount of water available. C) The number of predators available. D) The amount of competition in the ecosystem. Show Answer Correct Answer: B) The amount of water available. 24. Which statement describes an autotroph? A) It is an organism that makes its own food. B) It is an organism that eats other organisms. C) It is an organism that eats decaying matter. D) None of the above. Show Answer Correct Answer: A) It is an organism that makes its own food. 25. From an ecology perspective, a population is: A) The number of individuals in an ecosystem. B) The series of organisms in an ecosystem. C) The series of species in an ecosystem. D) The series of organisms of the same species in an ecosystem. Show Answer Correct Answer: D) The series of organisms of the same species in an ecosystem. ← 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