This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 21 (15 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The phenomenon by which environmental toxins become progressively move concentrated as organisms move up a food chain. A) Energy Pyramid. B) Biological Magnification. C) Secondary Consumer. D) Primary Consumer. Show Answer Correct Answer: B) Biological Magnification. 2. A(n) ..... chain shows the flow of ..... It always starts with the ..... and ends with the ..... Examples of decomposers are ..... and fungi. A) Food, energy, prey, predator, bacteria. B) Food, energy, producers, decomposer, bacteria. C) Energy, food, producers, decomposer, bacteria. D) Energy, food, prey, predator decomposers, protists. Show Answer Correct Answer: B) Food, energy, producers, decomposer, bacteria. 3. All organisms that do not fit into plant, fungi, and animal kingdoms but have a nucleus are: A) Archaebacteria. B) Protists. C) Eubacteria. D) Fungus. Show Answer Correct Answer: B) Protists. 4. A community is composed of A) Living organisms and their nonliving environment. B) One species of organism living in a specific environment on Earth. C) The factors that constitute an organism's niche. D) Potentially interacting populations of different kinds of organisms. Show Answer Correct Answer: D) Potentially interacting populations of different kinds of organisms. 5. Animals, fungi, and many bacteria cannot capture energy directly from sunlight or inorganic sources. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. When individuals join to come into a population A) Immigration. B) Emigration. C) All the above. D) None of the above. Show Answer Correct Answer: A) Immigration. 7. Red-billed oxpeckers are birds that feed on parasites found on an impala. The impala gets rid of parasites and the red-billed oxpeckers get a yummy dinner. This is an example of ..... A) Neutralism. B) Commensalism. C) Mutualism. D) Competition. Show Answer Correct Answer: C) Mutualism. 8. Which of the following is NOT an example of types of diversity? A) Species diversity. B) Ecosystem diversity. C) Number diversity. D) Genetic diversity. Show Answer Correct Answer: C) Number diversity. 9. Which evolutionary adaptation has enabled insects to be more successful and abundant than other animals? A) High reproductive rate. B) Well-developed respiratory system. C) Capacity for complete metamorphosis. D) Capability of asexual and sexual reproduction. Show Answer Correct Answer: A) High reproductive rate. 10. Herbivores eat only meat. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. What percent of the Sun's radiant energy is used for photosynthesis? A) 30%. B) 70%. C) 50%. D) Less than 1%. Show Answer Correct Answer: D) Less than 1%. 12. An example of colonial association could be: A) Coral groups. B) People living abroad in groups. C) Beehives. D) Herds of elephants. Show Answer Correct Answer: A) Coral groups. 13. How may large-scale deforestation affect the amount of carbon dioxide and oxygen in the atmosphere? A) By decreasing the amount of both carbon dioxide and oxygen. B) By decreasing the amount of carbon dioxide and increasing the amount of oxygen. C) By increasing the amount of both carbon dioxide and oxygen. D) By increasing the amount of carbon dioxide and decreasing the amount of oxygen. Show Answer Correct Answer: D) By increasing the amount of carbon dioxide and decreasing the amount of oxygen. 14. Which small mammal is mentioned as having a long ancestry and is of concern due to its potential endangerment? A) The wallaby. B) The musky rat kangaroo. C) The Tasmanian devil. D) The koala. Show Answer Correct Answer: B) The musky rat kangaroo. 15. Which abiotic factor is most likely to affect where plants live? A) Temperature. B) Light intensity. C) Grazing by herbivores. D) Availability of food. Show Answer Correct Answer: B) Light intensity. ← PreviousRelated QuizzesScience QuizzesClass 12 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books