This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 268 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 268 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When one organism preys on another organism for food A) Predation. B) Prey. C) Cooperation. D) Competition. Show Answer Correct Answer: A) Predation. 2. Given this statement, which trophic level does the snake belong to?A snake that eats a frog that has eaten an insect that fed on a plant A) Primary producer. B) Primary consumer. C) Secondary consumer. D) Tertiary consumer. Show Answer Correct Answer: D) Tertiary consumer. 3. Carbon dioxide is produced by the burning of fossil fuels A) True. B) False. Show Answer Correct Answer: A) True. 4. Why is the ocean important to the carbon cycle? A) It keeps sediment containing carbon underwater for millions of years. B) The ocean gives out more carbon then it takes in (increases global warming). C) The ocean isn't important to the carbon cycle. D) None of above. Show Answer Correct Answer: A) It keeps sediment containing carbon underwater for millions of years. 5. Human actions that release carbon into the atmosphere include A) Breathing. B) Making cement. C) Burning fossil fuels. D) All of the above. Show Answer Correct Answer: D) All of the above. 6. Anything that can live on its own A) Organism. B) Population. C) Community. D) Ecosystem. E) Biosphere. Show Answer Correct Answer: A) Organism. 7. An example of a density dependent factor would be ..... A) The speed of the current in a river. B) Going through a drought. C) Competition for food. D) How much rainfall an ecosystem gets per year. Show Answer Correct Answer: C) Competition for food. 8. The total variety of living organisms in the world is known as A) An ecological pyramid. B) Sustainable development. C) Biodiversity. D) Conservation biology. Show Answer Correct Answer: C) Biodiversity. 9. During ecological succession, which of the following would be the last things to develop in an area? A) Topsoil. B) Lichens. C) Hardwood trees. D) Annual flowers. Show Answer Correct Answer: C) Hardwood trees. 10. An inactive state during which normal body activities slow. A) Instinct. B) Camouflage. C) Migration. D) Hibernation. Show Answer Correct Answer: D) Hibernation. 11. If one species is helped, and one is NOT affected, what is the relationship? A) Mutualism. B) Predation. C) Commensalism. D) Parasitism. Show Answer Correct Answer: C) Commensalism. 12. The nitrogen found in the atmosphere is not in a form that plants or animals can use. What converts it into a usable form? A) Bacteria. B) Photosynthesis. C) Decomposition of organisms. D) Fungi. Show Answer Correct Answer: A) Bacteria. 13. Which of the following is an example of a biotic factor of an ecosystem? A) Soil. B) Water. C) Humans. D) Wind. Show Answer Correct Answer: C) Humans. 14. When aquatic organisms die, they sink to the bottom, so water near the bottom may contain more nutrients than water at other depths. A) True. B) False. Show Answer Correct Answer: A) True. 15. The phenomenon by which toxins concentrate in the organisms at higher trophic levels within an ecosystem is known as ..... A) Biotoxicity. B) Biomagnification. C) Eutrophication. D) Predation. Show Answer Correct Answer: B) Biomagnification. 16. If the number of births in a population is the same as the number of deaths in a population, what will happen to the growth of the population? A) It will increase. B) It will decrease. C) It will stay the same. D) It will fluctuate. Show Answer Correct Answer: C) It will stay the same. 17. Which organisms convert nitrogen to a usable form for plants and animals? A) Plants. B) Some animals. C) Some bacteria. D) Converters. Show Answer Correct Answer: C) Some bacteria. 18. Organisms that eat other organisms to gain energy. A) Autotroph. B) Heterotroph. C) Producer. D) None of above. Show Answer Correct Answer: B) Heterotroph. 19. The movement of water through Earth, its atmosphere and living things A) Carbon cycle. B) Tsnuami. C) Nitrogen cycle. D) Water cycle. Show Answer Correct Answer: D) Water cycle. 20. The kangaroo rat is able to get all of the water it needs through it's food and therefore, never needs to drink liquid. This animal has adapted to survive in which biome that rains less than 2 inches a year? A) Forest. B) Tundra. C) Desert. D) Grassland. Show Answer Correct Answer: C) Desert. ← 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