This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 43 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 43 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following BEST explains what will occur when a population grows larger than the carrying capacity of its environment? A) The emigration rate will decrease. B) The competition rate will decrease. C) The birth rate will increase. D) The death rate will increase. Show Answer Correct Answer: D) The death rate will increase. 2. Very rarely do ecosystems contain more than four trophic levels because there is not enough energy to support more. In which trophic level is there the least energyavailable? A) Producer. B) Primary consumer. C) Tertiary consumer. D) Secondary consumer. Show Answer Correct Answer: C) Tertiary consumer. 3. Second level of Organization A) Cells. B) Tissues. C) Organs. D) Organ System. E) Organism. Show Answer Correct Answer: B) Tissues. 4. Without detritivores and decomposers dead organisms would break down in other ways. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 5. What significant event is mentioned as a massive speciation event? A) The Industrial Revolution. B) The Cambrian explosion. C) The Permian Extinction. D) The Cretaceous Period. Show Answer Correct Answer: B) The Cambrian explosion. 6. A tarantula is a ..... A) Herbivore. B) Producer. C) Secondary consumer. D) Scavenger. Show Answer Correct Answer: C) Secondary consumer. 7. What's the difference between a food chain and a food web? A) Energy flows in many directions in a food chain and only in one direction in a food web. B) Energy flows in many directions in a food web and only in one direction in a food chain. C) All ecosystems have food chains but not all ecosystems have food webs. D) None of the above. Show Answer Correct Answer: B) Energy flows in many directions in a food web and only in one direction in a food chain. 8. Where can you find nitrogen-fixing bacteria? A) Decaying plants and animals. B) Waterlogged soil. C) Root nodules. D) Stems of leguminous plants. Show Answer Correct Answer: C) Root nodules. 9. The ..... zone is the ocean floor. A) Intertidal. B) Neritic. C) Oceanic. D) Benthic. Show Answer Correct Answer: D) Benthic. 10. Explain the concept of genetic diversity in relation to biodiversity. A) Biodiversity is not influenced by genetic diversity. B) Genetic diversity only affects individual organisms, not entire populations. C) Genetic diversity has no impact on biodiversity. D) Genetic diversity is important for biodiversity as it allows species to adapt to changing environments and helps maintain healthy populations. Show Answer Correct Answer: D) Genetic diversity is important for biodiversity as it allows species to adapt to changing environments and helps maintain healthy populations. 11. What do you call of the position of an organism in each level of a food chain? A) Pyramid. B) Ecosystem dynamics. C) Trophic level. D) Food chain. Show Answer Correct Answer: C) Trophic level. 12. In one ecosystem, snakes eat birds, plants make fruit, and birds eat fruit. What is the correct food chain? A) Snake$\rightarrow$plant$\rightarrow$bird. B) Bird$\rightarrow$plant$\rightarrow$snake. C) Plant$\rightarrow$bird$\rightarrow$snake. D) Snake$\rightarrow$bird$\rightarrow$plant. Show Answer Correct Answer: C) Plant$\rightarrow$bird$\rightarrow$snake. 13. The carrying capacity of a population is A) The limit of the number of people in a city. B) The maximum number of individuals an ecosystem can support. C) How many birds a cow can carry on its back. D) The amount of pollution humans can put into the environment. Show Answer Correct Answer: B) The maximum number of individuals an ecosystem can support. 14. After plants make glucose (sugar), with photosynthesis, they undergo ..... A) Cellular respiration. B) Biotic factors. C) Heterotroph. D) None of the above. Show Answer Correct Answer: A) Cellular respiration. 15. How do scientists organize living things? A) By looks. B) By shared characteristics. C) By size. D) By differences. Show Answer Correct Answer: B) By shared characteristics. 16. A tree is a ..... A) Composer. B) Decomposer. C) Producer. D) None of the above. Show Answer Correct Answer: C) Producer. 17. An organism is an abiotic factor A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 18. Hubungan biotik adalah ..... A) Hubungan antara makhluk hidup dengan lingkungannya. B) Hubungan antarmakhluk hidup dalam suatu ekosistem. C) Hubungan antarekosistem dalam biosfer. D) Hubungan antara makhluk hidup dalam suatu ekosistem dengan makhluk hidup dalam ekosistem yang lain. Show Answer Correct Answer: B) Hubungan antarmakhluk hidup dalam suatu ekosistem. 19. What is the potential future focus after studying past ecosystems? A) Space exploration. B) Historical human civilizations. C) Quantum physics. D) Future ecosystems. Show Answer Correct Answer: D) Future ecosystems. 20. In the water cycle, how can the ground gets the water? A) Respiration. B) Transpiration. C) Precipitation. D) Evaporation. Show Answer Correct Answer: C) Precipitation. 21. Which is a biotic limiting factor that would influence the growth of a deer population? A) A forest fire. B) High temperatures. C) Amount of plant growth. D) Amount of monthly rainfal. Show Answer Correct Answer: C) Amount of plant growth. 22. What are climax species? A) Short-lived species that mark the beginning of succession. B) Stable, long-lived species that mark the end of succession. C) Species that only live in deserts. D) Species that are always changing. Show Answer Correct Answer: B) Stable, long-lived species that mark the end of succession. 23. As the grasshopper and rabbit populations in an area increase, the amount of plants in the area decreases. What else will most likely increase? A) The carrying capacity of both grasshoppers and rabbits. B) Competition between grasshoppers and rabbits. C) The resources needed by both grasshoppers and rabbits. D) The diversity of the plants growing in the area. Show Answer Correct Answer: B) Competition between grasshoppers and rabbits. 24. Microbes in the soil have an important job. What is it A) Decomposers. B) Giving nutrients to plants. C) Absorption. D) A and b. Show Answer Correct Answer: D) A and b. 25. The first species to populate an area after a disturbance is called: A) A pioneer species. B) A pilgrim species. C) A founder species. D) A primary species. Show Answer Correct Answer: A) A pioneer species. ← 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