This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which symbols best describe mutualism? A) +, +. B) +, -. C) +, 0. D) -, 0. Show Answer Correct Answer: A) +, +. 2. An animal that hunts and kills another animal for food is a ..... A) Prey. B) Producer. C) Predator. D) Decomposer. Show Answer Correct Answer: C) Predator. 3. What is considered a mass extinction? A) The extinction of all Tasmanian tigers. B) A decrease in human population. C) The loss of a few species in a localized area. D) The extinction of all mammals. Show Answer Correct Answer: D) The extinction of all mammals. 4. What role do models play in scientific research according to the video? A) They are not useful in science. B) They are only used in mathematics. C) They are used to understand and explain scientific observations. D) They are used for decoration. Show Answer Correct Answer: C) They are used to understand and explain scientific observations. 5. This lake zone suffers from a lack of light and has limited photosynthesis: A) Littoral. B) Benthic. C) Profundal. D) Limnetic. Show Answer Correct Answer: C) Profundal. 6. All ecosystems contain at least one population of organisms. Which of the following could be considered a population? A) A pile of clamshells. B) A grove of apple trees. C) A mockingbird and its nest. D) A group of deer and mice. Show Answer Correct Answer: B) A grove of apple trees. 7. Which statement is correct about the pyramid of numbers? A) Higher the trophic level, lower the number of species and larger their size. B) Higher the trophic level, higher the number of species and larger their size. C) Higher the trophic level, lower the number of species and smaller their size. D) Higher the trophic level, higher the number of species and smaller their size. Show Answer Correct Answer: A) Higher the trophic level, lower the number of species and larger their size. 8. What does the PREDICTS project focus on? A) Studying the effects of solar flares. B) Analyzing a global database of ecological communities. C) Mapping the ocean floors. D) Predicting weather patterns. Show Answer Correct Answer: B) Analyzing a global database of ecological communities. 9. The best place to see the Rhinoceros are ..... A) Pench. B) Jim Corbett National Park. C) Jaladpura Sanctuary. D) Gir Forest. Show Answer Correct Answer: C) Jaladpura Sanctuary. 10. What is the purpose of a food chain? A) To convert energy from the sun into food. B) To describe how organizations get energy from eating other organizations. C) To produce energy for the ecosystem. D) To help put nutrients back into the soil. Show Answer Correct Answer: B) To describe how organizations get energy from eating other organizations. 11. Ilmu yang mempelajari tentang hubungan makhluk hidup dengan lingkungannya disebut ..... A) Ekosistem. B) Ekologi. C) Botani. D) Taksonomi. Show Answer Correct Answer: A) Ekosistem. 12. What cell part provides shape and structure for plant cells? A) Cell membrane. B) Cell wall. C) Cytoplasm. D) Chloroplasts. Show Answer Correct Answer: B) Cell wall. 13. Which characteristic of water vapour classifies it as a greenhouse gas? A) It absorbs then re-emits some of the long wave radiation emitted by the Earth's surface. B) It prevents short wave radiation from reaching the Earth's surface. C) It absorbs UV radiation but does not re-emit it. D) It absorbs infra-red radiation but does not re-emit it. Show Answer Correct Answer: A) It absorbs then re-emits some of the long wave radiation emitted by the Earth's surface. 14. What is a significant impact of human settlement on ecosystems? A) Increased biodiversity. B) Reduction in global temperatures. C) Declines in native flora and fauna. D) Stabilization of ecosystems. Show Answer Correct Answer: C) Declines in native flora and fauna. 15. What is one abiotic thing that could limit the population size of the primary consumer? A) Trees. B) Predator numbers. C) Prey available. D) Water access. Show Answer Correct Answer: D) Water access. 16. Population size can be determined by counting individuals or estimating? A) % Success. B) % Saturation. C) % Cover. D) % Yield. Show Answer Correct Answer: C) % Cover. 17. Blackspot fungus does not grow on roses when there is a large amount of sulfur dioxide in the atmosphere. This fungus serves as a ..... A) Secondary messenger. B) Bioindicator. C) Keystone species. D) Eco-service. Show Answer Correct Answer: B) Bioindicator. 18. Which of the following would be an example of a prey and predator relationship? A) Bee and a flower. B) Corn and a pig. C) Rabbit and a fox. D) Berry bush and a deer. Show Answer Correct Answer: C) Rabbit and a fox. 19. Red Foxes in Massachusetts in October 2020 A) Community. B) Species. C) Population. D) Organisms. Show Answer Correct Answer: C) Population. 20. Which best explains why internal fertilization is a greater advantage to an organism than external fertilization? A) Internal fertilization produces a large number of zygotes. B) Internal fertilization prevents mutations from occurring. C) Internal fertilization decreases the chance of mitotic cell division. D) Internal fertilization provides a protective environment for fertilization to occur. Show Answer Correct Answer: D) Internal fertilization provides a protective environment for fertilization to occur. 21. What is the role of the stem in a plant? A) Absorbing water and nutrients. B) Supporting the plant and transporting nutrients. C) Conducting photosynthesis. D) Reproducing seeds. Show Answer Correct Answer: B) Supporting the plant and transporting nutrients. 22. Apabila jumlah karbondioksida dalam suatu ekosistem berkurang, maka organisme yang pertama kali langsung merasakan akibatnya adalah ..... A) Pengurai. B) Produsen. C) Herbivora. D) Karnivora. Show Answer Correct Answer: B) Produsen. 23. The relationship between seaweed and sea turtles is an example of A) Decomposition. B) Predator and prey. C) Competition. D) Producer and consumer. Show Answer Correct Answer: D) Producer and consumer. 24. Why are many farmers encouraged to plant different types of crops on the same land throughout the year? A) It prevents insects from destroying crops. B) It provides more food to other countries. C) It allows for more genetic variation in plants. D) It helps to preserve the quality of the soil. Show Answer Correct Answer: D) It helps to preserve the quality of the soil. 25. The Australian pitcher plant (Cephalotus follicularis) is a green plant that traps and feeds on flies and other live insects. What is this plant's mode of nutrition? A) Producer and saprotroph. B) Autotroph and detritivore. C) Autotroph and heterotroph. D) Consumer and saprotroph. Show Answer Correct Answer: C) Autotroph and heterotroph. ← 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