This quiz works best with JavaScript enabled. Home > Science > Earth > Ecology – Quiz 136 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 136 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the role of decomposers in an Ecosystem? A) They recycle matter and nutrients to form fossil fuels. B) They are burn and release as carbon dioxide. C) Decomposers are responsible to turn oxygen into carbon dioxide. D) They recycle energy back to the sun. Show Answer Correct Answer: A) They recycle matter and nutrients to form fossil fuels. 2. This biome has the largest diversity (largest number of different kinds) of plant and animal species A) Desert. B) Tundra. C) Deciduous Forest. D) Tropical Rainforest. Show Answer Correct Answer: D) Tropical Rainforest. 3. This cycle deals with nitrification and nitrates A) Nitrogen. B) Water. C) Carbon. D) Phosphorus. Show Answer Correct Answer: A) Nitrogen. 4. Which is an example of a population? A) Different kinds of bacteria. B) A group of fish and sharks. C) Deer, bear, and rabbits. D) A herd of cattle. Show Answer Correct Answer: D) A herd of cattle. 5. Group of the SAME organisms living in an area A) Organism. B) Population. C) Community. D) Species. Show Answer Correct Answer: B) Population. 6. Global warming refers to an average ..... in the Earth's temperature, which in turn causes changes in ..... A) Increase, climate. B) Decrease, climate. C) Increase, temperature. D) Decrease, temperature. Show Answer Correct Answer: A) Increase, climate. 7. The land, sea and atmosphere on earth forms a A) Biosphere. B) Biome. C) Ecosystem. D) Organism. Show Answer Correct Answer: A) Biosphere. 8. 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. 9. 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. 10. Human influence A) Influence (impact). B) Destroy, destroy. C) Do something. D) Human influence. Show Answer Correct Answer: D) Human influence. 11. 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. 12. 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. 13. 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. 14. 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. 15. 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. 16. 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. 17. 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. 18. 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. 19. 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. 20. 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. ← PreviousNext →Related QuizzesScience QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books