This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Food webs model the relationships among species that live in the same environment. Which of thefollowing best illustrates a producer-decomposer relationship in an ecosystem? A) Mushrooms on a stump. B) A ladybug eating aphids. C) A squirrel eating walnuts. D) A vulture eating from a rabbit carcass. Show Answer Correct Answer: A) Mushrooms on a stump. 2. Which one of these trees are found in the cool and rainy regions? A) Sheesham. B) Birch. C) Pinus. D) Teak. Show Answer Correct Answer: B) Birch. 3. What is one biotic thing that could limit the population size of the primary consumer? A) Water access. B) Habitat destruction. C) Environmental disaster. D) Pollution. Show Answer Correct Answer: B) Habitat destruction. 4. Which catastrophic event will most likely have the effect of returning an ecosystem to primary succession? A) A tornado. B) A volcanic eruption. C) A flood. D) A drought. Show Answer Correct Answer: B) A volcanic eruption. 5. What two parts of the classification system are used for the naming of organisms? A) Domain and Kingdom. B) Genus and Species. C) Class and Family. D) Kingdom and Phylum. Show Answer Correct Answer: B) Genus and Species. 6. Which body system brings oxygen into the body so it can be delivered to cells to use for production of ATP? A) Digestion. B) Respiratory. C) Nervous. D) Muscular. Show Answer Correct Answer: B) Respiratory. 7. What is the Malthus model primarily concerned with? A) Climate change. B) Soil erosion. C) Population growth. D) Water cycles. Show Answer Correct Answer: C) Population growth. 8. Scientists are studying cellular respiration in a jungle ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the jungle carry out cellular respiration? A) Plants. B) Animals and decomposers. C) All organisms in the jungle. D) Animals. Show Answer Correct Answer: C) All organisms in the jungle. 9. An organism's place on a food chain is also called its A) Trophic level. B) Food chain level. C) Energy level. D) Biomass level. Show Answer Correct Answer: A) Trophic level. 10. Food flows along a food chain from consumers to producers to decomposers. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. What cell part decides what gets in and out of the cell? A) Cell wall. B) Nucleus. C) Cytoplasm. D) Cell membrane. Show Answer Correct Answer: D) Cell membrane. 12. A wildfire burns a region of a healthy grasslands ecosystem. Which climax community will MOST LIKELY arrive in the burned region due to ecological succession? A) A grasslands ecosystem, very similar to the original. B) A community of pioneer species, such as lichens. C) A grasslands ecosystem of plants only, without animals. D) A patchwork of grasslands, hardwood forest, and other ecosystems. Show Answer Correct Answer: A) A grasslands ecosystem, very similar to the original. 13. What is the significance of studying past environments and extinction events? A) To understand current ecosystems and inform future actions. B) To predict future lottery numbers. C) To find new species to introduce. D) To solely focus on historical data without application. Show Answer Correct Answer: A) To understand current ecosystems and inform future actions. 14. One of six major types of ecosystems is called: A) Biomes. B) Ecosystem. C) Tundra. D) Desert. Show Answer Correct Answer: A) Biomes. 15. Which of the following is capable of making its own food from sunlight and is the foundation of all food chains? A) Primary consumer. B) Top consumer. C) Consumer. D) Producer. Show Answer Correct Answer: D) Producer. 16. Which is not essential in a viable mesocosm? A) Light source. B) Autotroph. C) Herbivore. D) Saprotroph. Show Answer Correct Answer: C) Herbivore. 17. What are tiny organisms that float near the surface of the water? A) Plankton. B) Organisms. C) Abiotic factor. D) Insects. Show Answer Correct Answer: A) Plankton. 18. Which of the following is NOT an autotroph? A) Algae. B) Chemosynthetic microbes. C) Decomposers. D) Cyanobacteria. Show Answer Correct Answer: C) Decomposers. 19. Which vital element for life participates in the carbon, nitrogen, and phosphorous cycles? A) Oxygen. B) Sodium. C) Calcium. D) Chlorine. Show Answer Correct Answer: A) Oxygen. 20. When does exponential growth occur? A) Limited food. B) Unlimited resources. C) High competition. D) High death rates. Show Answer Correct Answer: B) Unlimited resources. 21. How does biotechnology impact the environment? A) It has no environmental impact. B) It can lead to increased biodiversity. C) It can result in unintended harm to ecosystems. D) It only affects urban areas. Show Answer Correct Answer: C) It can result in unintended harm to ecosystems. 22. The seasons, which influence temperature and the availability of water and light on land, are due to: A) The Earth's rotation and its climate. B) The Earth's tilt and rotation. C) The Earth's tilt and orbital movement. D) The Earth's tilt and latitude. Show Answer Correct Answer: C) The Earth's tilt and orbital movement. 23. A relationship where one organism benefits and one organism is harmed is called ..... A) Mutualism. B) Commensalism. C) Parasitism. D) None of the above. Show Answer Correct Answer: C) Parasitism. 24. Symbiotic mutualism can be seen on A) Ox and bird. B) Ants and grasshoper. C) Dolphin and shark. D) Crocodile and bull. Show Answer Correct Answer: A) Ox and bird. 25. What is the ultimate source of energy in any food chain or web? A) The sun. B) Producers. C) Consumers. D) Decomposers. Show Answer Correct Answer: A) The sun. ← 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 8Class 12 Biology Chapter 14 Ecosystem Quiz 9Class 12 Biology Chapter 14 Ecosystem Quiz 10Class 12 Biology Chapter 14 Ecosystem Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books