This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 181 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 181 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is more likely to be a density-independent factor? A) Abiotic Factor. B) Biotic factor. C) Idk. D) ?. Show Answer Correct Answer: A) Abiotic Factor. 2. All the organisms living in an area and the non-living features of their environment represent an ..... A) Ecology. B) Environment. C) Ecosystem. D) Organism. Show Answer Correct Answer: C) Ecosystem. 3. What eats the producers? A) The Sun. B) Other producers. C) 1st level consumers. D) Carnivores. Show Answer Correct Answer: C) 1st level consumers. 4. How does the nitrogen cycle benefit an ecosystem? A) Nitrogen is recycled in the ecosystem. B) Nitrogen is balanced in tree trunks. C) Nitrogen is broken down. D) Nitrogen is used up in the environment. Show Answer Correct Answer: A) Nitrogen is recycled in the ecosystem. 5. A tapeworm in an intestinal tract of an animal is an example of A) Commensalism. B) Parasitism. C) Mutualism. D) None of above. Show Answer Correct Answer: B) Parasitism. 6. A species that has died out is called: A) Extinct. B) Endangered. C) Population. D) Community. Show Answer Correct Answer: A) Extinct. 7. Which is NOT a freshwater ecosystem? A) A river. B) A lake. C) An estuary. D) A stream. Show Answer Correct Answer: C) An estuary. 8. Why is some energy not passed on to the next trophic level? A) The organisms at each level use about 90% of the available energy to live. B) The statement is NOT true. All energy IS passed from one trophic level to the next. C) The organisms at each level use about 10% of the available energy to live. D) Most energy is absorbed by the soil instead. Show Answer Correct Answer: A) The organisms at each level use about 90% of the available energy to live. 9. When members of a population move away from a given area, it is called A) Immigration. B) Emigration. C) Mortality. D) Mooooving out. Show Answer Correct Answer: B) Emigration. 10. What is an example of a carnivore? A) Bear. B) Chicken. C) Praying Mantis. D) Butterflies. Show Answer Correct Answer: C) Praying Mantis. 11. A single living thing is known as an A) Organism. B) Alive. C) Carnivore. D) Herbivore. Show Answer Correct Answer: A) Organism. 12. A diagram that shows the numbers of individual organisms at each trophic level in an ecosystem is called a(n) A) Biomass pyramid. B) Pyramid of numbers. C) Energy pyramid. D) Inverted pyramid. Show Answer Correct Answer: B) Pyramid of numbers. 13. Activity that decreases the amount of oxygen and increases the amount of carbon dioxide. A) Deforestation. B) Burning fossil fuels. C) Greenhouse effect. D) Climate change. Show Answer Correct Answer: A) Deforestation. 14. Two animals, one benefits, the other is harmed or killed A) Mutualism. B) Commensalism. C) Parasitism. D) None of above. Show Answer Correct Answer: C) Parasitism. 15. It is estimated that humans will cause more than half of the existing species in the world to go extinct in the next ..... years A) 10. B) 100. C) 1000. D) None of above. Show Answer Correct Answer: B) 100. 16. What is the water cycle? A) The 3 forms of water. B) The movement of water on, above, or below the surface of the Earth. C) When water melts. D) When clouds form. Show Answer Correct Answer: B) The movement of water on, above, or below the surface of the Earth. 17. Humans influence the nitrogen cycle by: A) Mining. B) Burning fossil fuels. C) Using fertilizer. D) Cutting down trees to make a wood fence locally. Show Answer Correct Answer: C) Using fertilizer. 18. Competition between same species is ..... A) Infraspecific competition. B) Inter-specific competition. Show Answer Correct Answer: A) Infraspecific competition. 19. A group of very similar organisms that can mate and reproduce offspring of the same type A) Community. B) Population. C) Species. D) Niche. Show Answer Correct Answer: C) Species. 20. This biome has lots of pressure, is dark and has many creepy fish and sea creatures ..... A) Beach. B) Coral reef. C) Estuary. D) Deep Ocean. Show Answer Correct Answer: D) Deep Ocean. ← 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