This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the main purpose of ecosystem services? A) To provide essential benefits to humans and the environment. B) To harm humans and the environment. C) To limit the resources available to humans and the environment. D) To create imbalance in the ecosystem. Show Answer Correct Answer: A) To provide essential benefits to humans and the environment. 2. A consumer that eats ONLY other consumers (meat) is a ..... A) Prey. B) Herbivore. C) Omnivore. D) Carnivore. Show Answer Correct Answer: D) Carnivore. 3. Which is the best example of parasitism? A) A flea sucking on the blood of a dog. B) A fox eating a rabbit. C) A flowering plant pollinated by a butterfly. D) A clownfish living inside a sea anemone. Show Answer Correct Answer: A) A flea sucking on the blood of a dog. 4. What contributes to rising atmospheric concentrations of carbon dioxide and increases average global temperatures? A) An increase in shorter wave radiation emitted by the Earth. B) An increase in longer wave radiation emitted by the Earth. C) An increase in the combustion of fossilised organic matter. D) The depletion of the ozone in the stratosphere. Show Answer Correct Answer: C) An increase in the combustion of fossilised organic matter. 5. The Carbon Cycle shows ..... A) The movement of carbon on earth and how carbon enters the food chain. B) The movement of oxygen on earth and it enters the food chain. C) The movement of water on earth and how hydrogen enters the food chain. D) None of the above. Show Answer Correct Answer: A) The movement of carbon on earth and how carbon enters the food chain. 6. An increase in which ecosystem factor could cause a population decline in a bird species? A) Emigration. B) Immigration. C) Number of births. D) Amount of food. Show Answer Correct Answer: A) Emigration. 7. What book by Dr. Carl is recommended? A) Dr. Carl's Little Book of Climate Science. B) The Science of Everything. C) Short Back & Science. D) It's Not Rocket Science. Show Answer Correct Answer: A) Dr. Carl's Little Book of Climate Science. 8. Define ecosystem resilience. A) Ecosystem resilience is the speed at which an ecosystem grows. B) Ecosystem resilience is the total biomass of an ecosystem. C) Ecosystem resilience refers to the diversity of species in an ecosystem. D) Ecosystem resilience is the ability of an ecosystem to recover from disturbances and maintain its functions. Show Answer Correct Answer: D) Ecosystem resilience is the ability of an ecosystem to recover from disturbances and maintain its functions. 9. What is the primary as well as secondary consumer in forest ecosystem? A) Rabbit. B) Deer. C) Man. D) Lion. Show Answer Correct Answer: C) Man. 10. Ecologists observe ecosystems by using their five A) Tools. B) Senses. C) Models. D) Scales. Show Answer Correct Answer: B) Senses. 11. What is a part of the food chain that makes its own food and nutrients? A) Consumer. B) Producer. C) Omnivore. D) Sun. Show Answer Correct Answer: B) Producer. 12. A symbiotic relationship where one species benefits and the other is not affected. A) Symbiosis. B) Mutualism. C) Parasitism. D) Commensalism. Show Answer Correct Answer: D) Commensalism. 13. A natural or human system's ability to recover after a disturbance is A) Adaptation. B) Ecosystem diversity. C) Resilience. D) Commensalism. Show Answer Correct Answer: C) Resilience. 14. Explain the concept of population in an ecosystem. A) The number of different ecosystems in an area. B) The weather patterns in an area. C) All the rocks and minerals in an area. D) All the organisms of the same species that live in the same area and interact with one another. Show Answer Correct Answer: D) All the organisms of the same species that live in the same area and interact with one another. 15. List three natural disruptions to ecosystems. A) Droughts, Air Pollution, Climate Change. B) Tsunamis, Urbanization, Deforestation. C) Earthquakes. D) Wildfires, hurricanes, floods. Show Answer Correct Answer: D) Wildfires, hurricanes, floods. 16. Organisms that digest molecules in organic material and convert them into inorganic forms are A) Detritivores. B) Primary producers. C) Decomposers. D) Primary consumers. Show Answer Correct Answer: C) Decomposers. 17. Which organisms use the sun's light energy? A) Producers. B) Consumers. C) Decomposers. D) Detritivores. Show Answer Correct Answer: A) Producers. 18. What cell part is the brain of the cell? A) Nucleus. B) Chloroplasts. C) Cell wall. D) Cytoplasm. Show Answer Correct Answer: A) Nucleus. 19. Which of the following best describes how ecosystems change due to seasonal variations? A) Ecosystems remain constant throughout the year. B) Ecosystems experience changes in species behavior and population dynamics. C) Ecosystems are unaffected by seasonal changes. D) Ecosystems only change due to human intervention. Show Answer Correct Answer: B) Ecosystems experience changes in species behavior and population dynamics. 20. Producer A) An individual who can make their own food. B) An individual who has to consume other organisms. C) An individual who only eats meat. D) An individual who only eats plants. Show Answer Correct Answer: A) An individual who can make their own food. 21. Explain the concept of ecological succession. A) Ecological succession is the process by which ecosystems change and develop over time. B) Ecological succession is the immediate response of an ecosystem to a disturbance. C) Ecological succession refers to the extinction of species in an ecosystem. D) Ecological succession is the process of creating new species in an ecosystem. Show Answer Correct Answer: A) Ecological succession is the process by which ecosystems change and develop over time. 22. Discuss the impact of human activities on ecosystems. A) Ecosystems are not affected by human activities. B) Human activities have no impact on ecosystems. C) Human activities always improve ecosystems. D) Human activities can disrupt ecosystems by destroying habitats, reducing biodiversity, and altering natural processes. Show Answer Correct Answer: D) Human activities can disrupt ecosystems by destroying habitats, reducing biodiversity, and altering natural processes. 23. A key stone species is ..... A) The top carnivore. B) Has the largest population. C) Has the most specialized niche. D) Determines numbers and types of other species. Show Answer Correct Answer: D) Determines numbers and types of other species. 24. During a biology field trip, Ella and William used a Transect line across a habitat to ..... A) Measure temperature. B) Count species. C) Record weather. D) Observe plant growth. Show Answer Correct Answer: B) Count species. 25. A diagram that shows the flow of energy up the food chain. A) Primary Consumer. B) Secondary Consumer. C) Energy Pyramid. D) Biological Magnification. Show Answer Correct Answer: C) Energy Pyramid. ← 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