This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the best explanation for an energy pyramid? A) It shows the FLOW of energy from one organism to the next. B) It shows HOW much energy flows through a food web. C) It shows the MEMBERS in a single organism. D) None of the above. Show Answer Correct Answer: B) It shows HOW much energy flows through a food web. 2. Relationship between organisms in which both organisms benefit A) Parasitism. B) Commensalism. C) Symbolism. D) Mutualism. Show Answer Correct Answer: D) Mutualism. 3. How is a food web different from a food chain? A) A food web combines many different food chains. B) A food web does not include decomposers whereas a food chain does. C) A food web is for insects whereas a food chain is for mammals. D) A food web is for insects whereas a food chain is for mammals. Show Answer Correct Answer: A) A food web combines many different food chains. 4. The disappearance of grasshoppers wouldhurt frogs more than snakes because they are the ..... source of food for the ..... A) Only, frog. B) Nothing, grass. C) Nothing, snake. D) Only, lettuce. Show Answer Correct Answer: A) Only, frog. 5. Frogs lay ~4000 eggs at a time. Based on this frogs would be classified as- A) R-strategists. B) K-strategists. C) All the above. D) None of the above. Show Answer Correct Answer: A) R-strategists. 6. Starfish are probably the most important predator in the shallow ecosystem because they eat basically anything that they can come across. Their feeding activities control the whole ecosystem. This is an example of the starfish ..... A) Habitat. B) Biotic factors. C) Tolerance level. D) Niche. Show Answer Correct Answer: D) Niche. 7. Which of the following is a result of ecological succession? A) A static ecosystem. B) A dynamic and changing ecosystem. C) An immediate increase in biodiversity. D) A decrease in species diversity. Show Answer Correct Answer: B) A dynamic and changing ecosystem. 8. Which Biome will be the hottest A) Taiga. B) Tundra. C) Rainforest. D) Desert. Show Answer Correct Answer: D) Desert. 9. The actual place an organism lives is its A) House. B) Habitat. C) Ecosystem. D) Environment. Show Answer Correct Answer: B) Habitat. 10. When organisms of the same species interact over things such as mates it is described as: A) Interspecific. B) Intraspecific. C) Species specific. D) Counter specific. Show Answer Correct Answer: B) Intraspecific. 11. In an ecosystem, a mouse eats grass seeds and a snake eats the mouse. Which of the following is correct. A) The mouse is a producer and the snake is a herbivore. B) The mouse is a herbivore and the snake is a carnivore. C) The mouse is a carnivore and the snake is a herbivore. D) Both the mouse and the snake are carnivores. Show Answer Correct Answer: B) The mouse is a herbivore and the snake is a carnivore. 12. (True or False)-Autotrophs are organisms that can undergo Photosynthesis to make their own nutrients such as plants and trees. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Unlike plants, animals cannot make their own food. How do animals obtain the energy they need? A) Animals absorb chemicals from the environment. B) Animals are able to function without taking energy in from their environment. C) Animals collect solar energy. D) Animals eat other organisms. Show Answer Correct Answer: D) Animals eat other organisms. 14. Which of the following is a primary source of energy for most ecosystems? A) Wind. B) Solar energy. C) Geothermal energy. D) Nuclear energy. Show Answer Correct Answer: B) Solar energy. 15. All of the different species of living things in a given area is called: A) Population. B) Community. C) Ecosystem. D) Biome. Show Answer Correct Answer: B) Community. 16. Which of the following is a correct pair of cycles? A) Water cycle and sulfur cycle. B) Oxygen and carbon cycle and nitrogen cycle. C) Phosphorus cycle and sulfur cycle. D) Water cycle and sulfur cycle. Show Answer Correct Answer: B) Oxygen and carbon cycle and nitrogen cycle. 17. Which of the following terms describes an organism that is able to make organic compounds from inorganic nutrients? A) Autotroph. B) Consumer. C) Detritivore. D) Saprotroph. Show Answer Correct Answer: A) Autotroph. 18. Describe the different levels of a trophic pyramid in a food chain. A) Herbivores, Carnivores, Omnivores. B) Plants, Insects, Birds. C) Decomposers, Detritivores, Scavengers. D) Producers, Primary Consumers, Secondary Consumers. Show Answer Correct Answer: D) Producers, Primary Consumers, Secondary Consumers. 19. A pyramid of biomass is one way to model an ecosystem. How does the amount of biomass generally change from the bottom of the pyramid to the top? A) The amount of biomass decreases. B) The amount of biomass increases. C) The amount of biomass varies only slightly, and may increase or decrease. D) The amount of biomass varies widely, and both increases and decreases. Show Answer Correct Answer: A) The amount of biomass decreases. 20. How do decomposers contribute to an ecosystem? A) Decomposers have no role in the ecosystem. B) They break down dead organisms and organic matter, recycling nutrients back into the environment. C) They help in the process of photosynthesis in plants. D) They contribute by creating new organisms in the ecosystem. Show Answer Correct Answer: B) They break down dead organisms and organic matter, recycling nutrients back into the environment. 21. What do decomposers do in a food chain? A) Produce energy for the ecosystem. B) Eat plants and other animals. C) Help put nutrients back into the soil. D) Convert energy from the sun into food. Show Answer Correct Answer: C) Help put nutrients back into the soil. 22. Prefix that means life. A) Bio. B) Biology. C) Terrestrial. D) Aquatic. Show Answer Correct Answer: A) Bio. 23. What are trophic levels? A) Different habitats. B) Each step in a food chain or food web. C) Levels of population growth. D) Only producers. Show Answer Correct Answer: B) Each step in a food chain or food web. 24. In any food chain, the first trophic level is occupied by: A) Herbivores. B) Secondary consumer. C) Producers. D) Keystone species. Show Answer Correct Answer: C) Producers. 25. Click Here to Access the ReadingGo to Reading 4According to READING 4, which of the following statements is BEST reflected by the data? A) African Buffalo require more green leaves in their diet than other animals. B) African Buffalo require more dry leaves in their diet than other animals. C) African buffalo require more other plant parts in their diet than other animals. D) African buffalo have the same diet as other animals. Show Answer Correct Answer: A) African Buffalo require more green leaves in their diet than other animals. ← 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 9Class 12 Biology Chapter 14 Ecosystem Quiz 10Class 12 Biology Chapter 14 Ecosystem Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books