This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 139 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 139 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The land, sea and atmosphere on earth forms a A) Biosphere. B) Biome. C) Ecosystem. D) Organism. Show Answer Correct Answer: A) Biosphere. 2. Primary producers are the first trophic level in an ecosystem's food chain, food web, or energy pyramid. Which statement best explains why thisis true? A) Producers are usually smaller in size thanconsumers. B) Producers provide chemical energy for all consumers in the ecosystem. C) There are more producers than consumers. D) Consumers are always more complexorganisms than producers. Show Answer Correct Answer: B) Producers provide chemical energy for all consumers in the ecosystem. 3. If Timon is eating an insect he is a ..... consumer A) Primary. B) Secondary. C) Tertiary. D) None of above. Show Answer Correct Answer: B) Secondary. 4. Human influence A) Influence (impact). B) Destroy, destroy. C) Do something. D) Human influence. Show Answer Correct Answer: D) Human influence. 5. What is the condition of the Earth's atmosphere at a certain time and place? A) Climate. B) Temperature. C) Weather. D) Air pressure. Show Answer Correct Answer: C) Weather. 6. Birds lay their nests on trees without hurting the trees. This relationship is A) Mutualism. B) Predation. C) Commensalism. D) Competition. Show Answer Correct Answer: C) Commensalism. 7. The most important way of an ecological lifestyle is ..... A) Proper waste disposal. B) Waste reduction. C) Waste recycling. D) None of above. Show Answer Correct Answer: B) Waste reduction. 8. To be able to use the materials locked up in dead organisms, the main role is played by ..... A) Secondary consumer. B) Scavenger. C) Decoposer. D) Producer. Show Answer Correct Answer: C) Decoposer. 9. High biodiversity helps an ecosystem be more sustainable because: A) More species with different adaptations are better able to survive a disaster. B) More species can survive a disease. C) There is plenty of food for everyone. D) All of the above. Show Answer Correct Answer: D) All of the above. 10. Nitrogen fixation is the process in which certain bacteria convert nitrogen gas into A) Liquid nitrogen. B) Nitrates. C) Nitrites. D) Ammonia. Show Answer Correct Answer: D) Ammonia. 11. A species is defined as endangered when it A) Suffers from damage to its habitat. B) Suffers from disease or predation. C) When there are hazards to the continued life of the species. D) All of the above. Show Answer Correct Answer: D) All of the above. 12. A symbiotic relationship where one organism benefits and the other one doesn't benefit and isn't harmed. A) Mutualism. B) Commensalism. C) Parasitism. D) None of above. Show Answer Correct Answer: B) Commensalism. 13. What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere? A) Assimilation. B) Fixation. C) Ammonification. D) Denitrification. Show Answer Correct Answer: D) Denitrification. 14. When an animal dies, the once-living matter from the animal's body A) Regenerates so the animal can live again. B) Remains exactly the same for millions of years. C) Is broken down and passes into the soil and air. D) Disintegrates into small particles that eventually disappear. Show Answer Correct Answer: C) Is broken down and passes into the soil and air. 15. Dirty air, water and soil A) Environment. B) Pollute. C) Floor. D) Pollution. Show Answer Correct Answer: D) Pollution. 16. An organism that makes its own food for energy A) Consumer. B) Predator. C) Prey. D) Producer. Show Answer Correct Answer: D) Producer. 17. What is the thinnest layer of the Earth? A) Mantle. B) Inner core. C) Outer core. D) Crust. Show Answer Correct Answer: D) Crust. 18. Term used to describe the Earth which is home to all living things. A) Ecology. B) Ecosystem. C) Biosphere. D) Biome. Show Answer Correct Answer: C) Biosphere. 19. Which of the following is an example of a biotic factor? A) Parasitism. B) Plants. C) Disease. D) All of the above. Show Answer Correct Answer: B) Plants. 20. Which is another word for an organism? A) Abiotic factor. B) Biotic factor. C) Nonliving thing. D) None of above. Show Answer Correct Answer: B) Biotic factor. ← PreviousNext →Related QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9Ecology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books