This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 46 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 46 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What can climate act as in the process of microevolution? A) An irrelevant factor. B) A stabilizing factor. C) A decreasing agent. D) A selecting agent. Show Answer Correct Answer: D) A selecting agent. 2. Most evaporation occurs from A) Rivers. B) Trees. C) Oceans. D) Glaciers. Show Answer Correct Answer: C) Oceans. 3. Greenhouse Gas A) Gases that cool the Earth's atmosphere. B) Gases such as carbon dioxide and methane that trap heat in Earth's atmosphere. C) Gases that are released during photosynthesis. D) Gases that are found only in industrial areas. Show Answer Correct Answer: B) Gases such as carbon dioxide and methane that trap heat in Earth's atmosphere. 4. How much energy is passed to the next trophic level? A) 100%. B) 50%. C) 25%. D) 10%. Show Answer Correct Answer: D) 10%. 5. Which statement defines community? A) The place where an organism lives. B) A group of one type of species in an area. C) All organisms in an ecosystem. D) Total variety of living organisms on the planet. Show Answer Correct Answer: C) All organisms in an ecosystem. 6. A declining population is: A) Invasive. B) Endemic. C) Endangered. D) Stable. Show Answer Correct Answer: C) Endangered. 7. A population of baboons has access to plenty of food, shelter, and space to live but has an inadequate supply of water. Which of these BEST defines the water in this case? A) Limiting factor. B) Limiting reagent. C) Darwinian shortfall. D) Biochemical constraint. Show Answer Correct Answer: A) Limiting factor. 8. What two factors are attributed to population decline? A) Increase Birth rate & increase Death rate. B) Increase Death rate & increase Emigration rate. C) Emigration & Immigration. D) Immigration & increase Birth rate. Show Answer Correct Answer: B) Increase Death rate & increase Emigration rate. 9. Each level in a food chain is called as ..... A) Food web. B) Trophic level. C) Energy level. D) Interdependence. Show Answer Correct Answer: B) Trophic level. 10. It is the interconnection of food chains and represents of what eats what in an ecological community. A) Food pyramid. B) Food chain. C) Food transfer. D) Food web. Show Answer Correct Answer: D) Food web. 11. An organism that kills and eats another for food A) Predator. B) Prey. C) Parasite. D) Plant. Show Answer Correct Answer: A) Predator. 12. The pyramid of ..... always decreases in size as you move up the trophic levels. A) Energy. B) Biomass. C) Numbers. D) Mummies. Show Answer Correct Answer: A) Energy. 13. What is the relationship between corals and zooxanthellae described as? A) Competitive. B) Commensal. C) Mutualistic. D) Parasitic. Show Answer Correct Answer: C) Mutualistic. 14. Which choice shows the correct order of the levels of environmental organization? A) Organism, population, community, ecosystem, biome, biosphere. B) Organism, population, biome, ecosystem, biosphere, community. C) Organism, community, population, ecosystem, biosphere, biome. D) Population, biome, ecosystem, biosphere, organism, community. Show Answer Correct Answer: A) Organism, population, community, ecosystem, biome, biosphere. 15. This organelle is in both plants and animals. It controls what goes in and out of a cell. A) Cell wall. B) Cell membrane. C) Cell organelles. D) Mitochondria. Show Answer Correct Answer: B) Cell membrane. 16. Which organism breaks down dead plants and animals? A) Consumer. B) Producer. C) Decomposer. D) Predator. Show Answer Correct Answer: C) Decomposer. 17. Fourth level of Organization A) Cells. B) Tissues. C) Organs. D) Organ System. E) Organism. Show Answer Correct Answer: D) Organ System. 18. What type of species plays a vital and unique role in maintaining structure, stability, and diversity in an ecosystem? A) Pioneer species. B) Indicator species. C) Keystone species. D) None of the above. Show Answer Correct Answer: C) Keystone species. 19. What are omnivores and provide an example? A) Omnivores-Example:Bears. B) Omnivores-Example:Snakes. C) Omnivores-Example:Elephants. D) Omnivores-Example:Lions. Show Answer Correct Answer: A) Omnivores-Example:Bears. 20. Nonvascular plants usually grow in: A) Damp, shady areas. B) Deserts. C) Arctic regions. D) Sunny fields. Show Answer Correct Answer: A) Damp, shady areas. 21. A pond ecosystem includes a number of different types of birds, mammals, reptiles, and fish. All of these different groups make up the ecosystem's A) Microorganisms. B) Abiotic factors. C) Populations. D) Community. Show Answer Correct Answer: D) Community. 22. A relationship between a mosquito and a human is called ..... and it means that ..... : A) Parasitism-one gains and one is harmed. B) Predation-one gets eaten and one benefits. C) Competition-one species gains over another. D) Mutualism-both gain. E) Commensalism-one gains, one is not affected. Show Answer Correct Answer: A) Parasitism-one gains and one is harmed. 23. Density-independent A) A limiting factor that affects a population no matter its size (ex:natural disasters). B) A factor that only affects large populations. C) A factor that increases with population density. D) A limiting factor that decreases as population size increases. Show Answer Correct Answer: A) A limiting factor that affects a population no matter its size (ex:natural disasters). 24. Thomas is describing an example of secondary succession. Which of the following events is most useful for him to include? A) Lichens begin growing on rocks that formed from a volcanic eruption. B) Many fishes die in a pond when oxygen levels decrease. C) The populations of wolves and rabbits change in a cyclical pattern. D) Small plants and animals return to the land after a forest fire. Show Answer Correct Answer: D) Small plants and animals return to the land after a forest fire. 25. Example of a decomposer A) Fungus. B) Mouse. C) Plants. D) Frogs. Show Answer Correct Answer: A) Fungus. ← 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