This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is NOT a factor contributing to the bleaching of the Great Barrier Reef? A) Changes in sea water acidity. B) Rates of fishing. C) Decrease in sea water temperatures. D) Increased sedimentation from runoff. Show Answer Correct Answer: C) Decrease in sea water temperatures. 2. What will happen if all of the frogs in a population die? A) The frogs' predators will decrease and the frogs' prey will increase. B) The frogs' predators will increase and the frogs' prey will decrease. C) We better all pray because there isn't anymore frogs. D) None of the above. Show Answer Correct Answer: A) The frogs' predators will decrease and the frogs' prey will increase. 3. When death rate is equal to birth rate ..... A) Population increases. B) Population decreases. C) Population stays the same. D) Population rapidly increases then becomes stable. Show Answer Correct Answer: C) Population stays the same. 4. The usual weather in a place is called: A) Ecosystem. B) Weather. C) Climate. D) Niche. Show Answer Correct Answer: C) Climate. 5. How does solar irradiance affect the abundance of life on Earth? A) It provides heat. B) It supports photosynthesis. C) It causes erosion. D) It creates wind. Show Answer Correct Answer: B) It supports photosynthesis. 6. What additional human activities exacerbate the impact of climate change on biodiversity? A) Land clearing and deforestation. B) Increased use of renewable resources. C) Reduction in fossil fuel consumption. D) Expansion of natural habitats. Show Answer Correct Answer: A) Land clearing and deforestation. 7. What does 'sclerophyll' literally mean? A) Dry leaf. B) Hard leaf. C) Green leaf. D) Soft leaf. Show Answer Correct Answer: B) Hard leaf. 8. Which of the following describes an antibody? A) A medicine used to treat bacterial infections. B) A molecule that specifically marks pathogens for death. C) A molecule that kills any pathogen it comes into contact with. D) A pathogen that is created by viruses. Show Answer Correct Answer: B) A molecule that specifically marks pathogens for death. 9. We expect that a keystone species that is a predator will A) Reduce the diversity of the community. B) Harvest prey species down to extinction. C) Help many of its prey reproduce. D) Maintain the species diversity in a community. Show Answer Correct Answer: D) Maintain the species diversity in a community. 10. Biomass A) Renewable organic material that comes from plants and animals. B) The number of people, other living organisms, or crops that a region can support without environmental degradation. C) An organism that feeds on primary producers. Herbivores. D) A non-living part of an ecosystem that shapes its environment. Show Answer Correct Answer: A) Renewable organic material that comes from plants and animals. 11. Community of organisms and the abiotic factors in their environment. A) Heat. B) Geosphere. C) Herbivore. D) Ecosystem. Show Answer Correct Answer: D) Ecosystem. 12. A/an ..... consists of all the biotic and abiotic factors in an area and their interactions. A) Niche. B) Habitat. C) Ecosystem. D) Population. Show Answer Correct Answer: C) Ecosystem. 13. Density-independent factor example: A) Competition. B) Predation. C) Parasites. D) Hurricane. Show Answer Correct Answer: D) Hurricane. 14. Ecosystems need constant inputs of ..... A) Organisms. B) Matter. C) Water. D) Energy. Show Answer Correct Answer: D) Energy. 15. Maggots feed on dead and decaying organisms for energy. What are maggots? A) Autotrophs. B) Producers. C) Decomposers. D) Heterotrophs. Show Answer Correct Answer: C) Decomposers. 16. When one species benefits and the other is not harmed A) Mutualism. B) Commensalism. C) Parasitism. D) Adaptations. Show Answer Correct Answer: B) Commensalism. 17. A species that is nonnative to an area, no natural predators, and a high capacity to reproduce. A) Upper Limit. B) Lower Limit. C) Range of Tolerance. D) Invasive Species. Show Answer Correct Answer: D) Invasive Species. 18. The deepest parts of the benthic zone do not get any ..... A) Sunlight. B) Food. C) Fish. D) Chemicals. Show Answer Correct Answer: A) Sunlight. 19. Describe the impact of climate change on ecosystems. A) Ecosystems thrive under climate change conditions. B) Climate change only affects human populations, not ecosystems. C) Climate change disrupts ecosystems by altering species distributions, causing habitat loss, and affecting food webs and biodiversity. D) Climate change has no effect on ecosystems. Show Answer Correct Answer: C) Climate change disrupts ecosystems by altering species distributions, causing habitat loss, and affecting food webs and biodiversity. 20. Which is NOT a life process? A) Reproduce. B) Photosynthesis. C) Sensitivity. D) Grow. Show Answer Correct Answer: B) Photosynthesis. 21. How does the energy flow through a food chain? A) Energy flows from decomposers to producers in a food chain. B) Energy flows from producers to consumers in a food chain. C) Energy flows from consumers to producers in a food chain. D) Energy flows from predators to prey in a food chain. Show Answer Correct Answer: B) Energy flows from producers to consumers in a food chain. 22. A community of animals and plants interacting with their environment is called: A) Niche. B) Biome. C) Ecosystem. D) Community. Show Answer Correct Answer: C) Ecosystem. 23. Some bacteria, such as Spirochaeta cytophaga, have the capacity to decompose cellulose by secreting enzymes to break down the cellulose externally and then absorbing the products. Which of the following would describe this organism best? A) Chemoautotroph. B) Detritivore. C) Saprotroph. D) Photoautotroph. Show Answer Correct Answer: C) Saprotroph. 24. What term describes all species within a habitat? A) Population. B) Community. C) Biome. D) Ecosystem. Show Answer Correct Answer: B) Community. 25. Which of the following ecosystems helps prevent flooding and erosion of soil? A) Wetlands. B) Grasslands. C) Oceans. D) None of the above. Show Answer Correct Answer: A) Wetlands. ← 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