This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is a significant impact of models in studying ecosystems? A) They can predict fashion trends. B) They can track climate change effects from genes to ecosystems. C) They are used to make movies. D) They are primarily used for social media. Show Answer Correct Answer: B) They can track climate change effects from genes to ecosystems. 2. Which of the following would be a density independent limiting factor? A) A virus spreading through a population. B) A forest fire burning down a forest. C) Birds competing for a limited amount of seeds. D) A new predator moving to an area. Show Answer Correct Answer: B) A forest fire burning down a forest. 3. What is the main focus of the video discussed? A) Investigating changes in past ecosystems to manage future ecosystems. B) Studying the Permian Extinction in detail. C) Understanding the basics of biology. D) Learning about the Cambrian explosion. Show Answer Correct Answer: A) Investigating changes in past ecosystems to manage future ecosystems. 4. What is a significant adaptation of sclerophyll plants to dry climates? A) Soft, water-retaining leaves. B) Brightly colored flowers. C) Hard, toxin-filled leaves. D) Ability to float on water. Show Answer Correct Answer: C) Hard, toxin-filled leaves. 5. An ecosystem is only consist of living things.Satu ekosistem hanya terdiri daripada benda hidup. A) Truebenar. B) Falsepalsu. C) All the above. D) None of the above. Show Answer Correct Answer: B) Falsepalsu. 6. An ..... is where living and non-living are in an area. A) Ecosystem. B) Home. C) Environment. D) Claim. Show Answer Correct Answer: C) Environment. 7. A relationship where one species benefits and the other is harmed A) Mutualism. B) Commensalism. C) Parasitism. D) Adaptations. Show Answer Correct Answer: C) Parasitism. 8. Which of the following ecosystems is where the freshwater river meets the ocean? A) Lakes and ponds. B) Marshes. C) Estuary. D) None of the above. Show Answer Correct Answer: C) Estuary. 9. Which organism is an example of a producer? A) Moth. B) Mushroom. C) Rose bush. D) Cheetah. Show Answer Correct Answer: C) Rose bush. 10. What types of organisms are producers? A) Autotrophs. B) Apex predators. C) Heterotrophs. D) Keystone species. Show Answer Correct Answer: A) Autotrophs. 11. This is the branch of science that studies how living things interact with one another and with their environment. A) Ecosystem. B) Biome. C) Ecology. D) Habitat. Show Answer Correct Answer: C) Ecology. 12. As space and nutrients become limited, which term best describes the number of bacteria an environment can support? A) Emigration. B) Competition. C) Carrying capacity. D) Population density. Show Answer Correct Answer: C) Carrying capacity. 13. What is the role of an oak tree in an ecosystem? A) It cannot make its own food. B) It uses the sun's energy to make food. C) It eats other organisms. D) It breaks down dead organisms and returns nutrients to the soil. Show Answer Correct Answer: B) It uses the sun's energy to make food. 14. What is the primary role of producers in an ecosystem? A) To decompose organic matter. B) To consume other organisms. C) To produce energy from sunlight. D) To compete with other species. Show Answer Correct Answer: C) To produce energy from sunlight. 15. The more diverse an ecosystem is ..... A) The more threatened its populations are. B) The more similar the species will be. C) The more sustainable it is. D) The fewer varieties of species are present. Show Answer Correct Answer: C) The more sustainable it is. 16. Density-dependent effects include: A) Weather. B) Human activity. C) Competition, predation, disease, parasitism. D) Soil quality. Show Answer Correct Answer: C) Competition, predation, disease, parasitism. 17. Plants, animals, bacteria and fungi would all be examples of ..... A) Biotic Factors. B) Abiotic Factors. C) Predators. D) Prey. Show Answer Correct Answer: A) Biotic Factors. 18. All the nonliving things in an environment are called the ..... factors. A) Abiotic. B) Biotic. C) Ecological. D) Inorganic. Show Answer Correct Answer: A) Abiotic. 19. Which of the following is a consumer that eats both plants and animals? A) Herbivore. B) Omnivore. C) Scavenger. D) Carnivore. Show Answer Correct Answer: B) Omnivore. 20. 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 the above. Show Answer Correct Answer: C) Commensalism. 21. Which of the following ecosystems is AQUATIC? A) Wetlands. B) Oceans. C) Forests. D) None of the above. Show Answer Correct Answer: B) Oceans. 22. A food chain is shown.plant $\rightarrow$ grasshopper $\rightarrow$ bird $\rightarrow$ snake $\rightarrow$ owlWhat will most likely occur if there is a decrease in the bird population? A) The owl population will increase. B) The snake population will increase. C) The plant population will decrease. D) The grasshopper population will decrease. Show Answer Correct Answer: C) The plant population will decrease. 23. Which major biome is home to cacti, mesquite, white thorn, pack rats, small reptiles, and coyotes? A) Desert. B) Taiga. C) Tundra. D) Grassland. Show Answer Correct Answer: A) Desert. 24. Detritus is a A) Fungus. B) Algae. C) Carnivore. D) Decomposing Bacteria. Show Answer Correct Answer: D) Decomposing Bacteria. 25. What Biome do we live in? A) Deciduous Forest. B) Tropical Rain Forest. C) Taiga. D) Grasslands. Show Answer Correct Answer: A) Deciduous Forest. ← 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