This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 31 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A tree is an example of a ..... A) Consumer. B) Decomposer. C) Producer. D) None of the above. Show Answer Correct Answer: C) Producer. 2. A species is a group of similar organisms, able to interbreed and produce offsprings A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 3. Extreme algal growth in aquatic environments due to nitrogen/phosphorous pollution. A) Biome. B) Longitude. C) Eutrophication. D) Habitat Fragmentation. Show Answer Correct Answer: C) Eutrophication. 4. Which part of the ocean receives the LEAST amount of sunlight? A) Top. B) Middle. C) Bottome. D) None of the above. Show Answer Correct Answer: C) Bottome. 5. What activity most contributes to the depletion of the ozone layer? A) Burning fossil fuels. B) Release of CFCs. C) Deforestation. D) Overuse of fertilizers. Show Answer Correct Answer: B) Release of CFCs. 6. Which biome, because of its climate and amount of rainfall, has the largest number of species of plants and animals? A) Tundra. B) Rainforest. C) Desert. D) Pineforest. Show Answer Correct Answer: B) Rainforest. 7. (9)Which land biome has hot summers and cold winters with a high-average amount of precipitation and trees that lose their leaves? A) Temperate deciduous forest. B) Tropical rainforest. C) Coniferous forest. D) Temperate grassland. Show Answer Correct Answer: A) Temperate deciduous forest. 8. What is the significance of the nitrogen cycle in an ecosystem? A) It is only important for aquatic ecosystems. B) It only affects the nitrogen levels in the atmosphere. C) It has no impact on the ecosystem. D) It is essential for the growth of plants and the production of proteins. Show Answer Correct Answer: D) It is essential for the growth of plants and the production of proteins. 9. What is the purpose of using the geological time scale? A) To study the history of human civilization. B) To understand the impact of events on biodiversity. C) To memorize all epochs and eras. D) To predict future geological events. Show Answer Correct Answer: B) To understand the impact of events on biodiversity. 10. Autotrophs can be classified into two groups according to which of these properties? A) Energy source, either sunlight or chemicals. B) Food type, either plant matter or animal matter. C) Food quality, either living matter or dead matter. D) Water quality, either fresh water or salt water. Show Answer Correct Answer: A) Energy source, either sunlight or chemicals. 11. Which of the following is in order from largest to smallest? A) Ecosystem-community-population-organism. B) Ecosystem-population-community-organism. C) Ecosystem-community-organism-population. D) None of the above. Show Answer Correct Answer: A) Ecosystem-community-population-organism. 12. Chemoautotrophs gain energy from the oxidisation of inorganic substances such as hydrogen sulphide & ammonia through chemosynthesis. An example of a chemoautotrophs is a ..... A) Fungi. B) Bacteria. C) Green plant. D) Human. Show Answer Correct Answer: B) Bacteria. 13. What happens to the numbers of predators if their prey numbers drop? A) They also drop. B) They go up. C) They stay the same. D) None of the above. Show Answer Correct Answer: A) They also drop. 14. Which type of mimicry involves a harmless species resembling a harmful one? A) Aposematic mimicry. B) Cryptic mimicry. C) Batesian mimicry. D) Mullerian mimicry. Show Answer Correct Answer: C) Batesian mimicry. 15. Why might a numbers pyramid be inverted in a forest? A) Energy increases at higher levels. B) Small numbers of large producers can support many insects and birds. C) Producers always outnumber consumers. D) Biomass is greater at the top. Show Answer Correct Answer: B) Small numbers of large producers can support many insects and birds. 16. Name This Relationship:Colobus Monkey and Fig Tree A) Predation. B) Parasitism. C) Commensalism. D) Mutualism. Show Answer Correct Answer: D) Mutualism. 17. Which would be a limiting factor on the rats A) The availability of food. B) The number of predators. C) The availability of abiotic resources. D) All are limiting factors. Show Answer Correct Answer: D) All are limiting factors. 18. What characterizes exponential growth? A) Slow and steady increase. B) Rapid growth (1, 2, 4, 8, 16, 32 ). C) Decline in population size. D) Fluctuating growth rates. Show Answer Correct Answer: B) Rapid growth (1, 2, 4, 8, 16, 32 ). 19. What is the name of an organism that makes its own food A) Consumer. B) Omnivore. C) Producer. D) Predator. Show Answer Correct Answer: C) Producer. 20. Berikut ini yang merupakan produsen pada ekosistem danau adalah ..... A) Fitoplankton. B) Zooplankton. C) Jamur. D) Bakteri. Show Answer Correct Answer: A) Fitoplankton. 21. Which is the correct, balanced equation for PHOTOSYNTHESIS? A) C6H12O6 + 6O2 + 6H2O + sunlight $\rightarrow$ 6CO2 + 12H2O. B) C6H12O6 + 6O2 + 6H2O + ATP$\rightarrow$ 6CO2 + 12H2O. C) 6CO2 + 12H2O + sunlight $\rightarrow$ C6H12O6 + 6O2 + 6H2O. D) C6H12O6 + 6O2 + 6H2O $\rightarrow$ 6CO2 + 12H2O + ATP. Show Answer Correct Answer: C) 6CO2 + 12H2O + sunlight $\rightarrow$ C6H12O6 + 6O2 + 6H2O. 22. Which of the following is not an advantage of using a mesocosm to explore the impact of an environmental factor rather than doing it in situ (in the original place)? A) The experiment is identical to the natural environment. B) The experiment can be controlled. C) The experiment can be repeated/multiple samples taken. D) The experiment is continuous. Show Answer Correct Answer: A) The experiment is identical to the natural environment. 23. Animals that eat a variety of meats, fruits, and vegetables are A) Producers. B) Carnivores. C) Omnivores. D) Herbivores. Show Answer Correct Answer: C) Omnivores. 24. An organism that gets its energy by eating producers. A) Primary Consumer. B) Secondary Consumer. C) Energy Pyramid. D) Biological Magnification. Show Answer Correct Answer: A) Primary Consumer. 25. What is the hierarchy of organisms in a food chain? A) Plants, primary consumers, secondary consumers, top predators. B) Top predators, secondary consumers, primary consumers, plants. C) Plants, secondary consumers, primary consumers, top predators. D) Secondary consumers, primary consumers, plants, top predators. Show Answer Correct Answer: A) Plants, primary consumers, secondary consumers, top predators. ← 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