This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 81 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 81 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Living organisms in an environment interact with one another and also with non living components forms an A) Ecosystem. B) Ecology. C) Biotic. D) Abiotic. Show Answer Correct Answer: A) Ecosystem. 2. Autotrophs make their own food. A) True. B) False. Show Answer Correct Answer: A) True. 3. Commensalism is when A) Both species benefit. B) One species benefits and one is harmed. C) One species benefits and one is unaffected. D) No one benefits. Show Answer Correct Answer: C) One species benefits and one is unaffected. 4. An animal that get its food and energy from eating producers A) Secondary Consumer. B) Tertiary Consumer. C) Primary Consumer. D) None of above. Show Answer Correct Answer: C) Primary Consumer. 5. Let's play ..... together. A) Beach. B) Sandwich. C) Checkers. D) Sea. Show Answer Correct Answer: C) Checkers. 6. Competition can happen within ..... A) Only the same species. B) Only among different species. C) Both same and different species. D) None of above. Show Answer Correct Answer: C) Both same and different species. 7. How do animals get the nitrogen they need? A) From the air they breathe. B) From the water they drink. C) From the food they eat. D) From the sun. Show Answer Correct Answer: C) From the food they eat. 8. What animal from the list below lives in the ocean ecosystem? A) Lion. B) Tiger. C) Bear. D) Dolphin. Show Answer Correct Answer: D) Dolphin. 9. An organism that breaks down and recycles dead organisms A) Decoposer. B) Consumer. C) Predator. D) None of above. Show Answer Correct Answer: A) Decoposer. 10. How are the living creatures in an ecosystem linked? A) By what they eat. B) By how they breathe. C) By their size. D) By their species'. Show Answer Correct Answer: A) By what they eat. 11. Which is NOT a way to help protect biodiversity A) Going organic. B) Saving energy. C) Using plastics whenever possible. D) None of above. Show Answer Correct Answer: C) Using plastics whenever possible. 12. Antelope and zebras interacting is an example of a (n) A) Community. B) Population. C) Ecosystem. D) Biome. Show Answer Correct Answer: A) Community. 13. A plover is a little bird that walks around inside a crocodile's open mouth and cleans between the crocodile's teeth. What type of relationship is this? A) Commensalism. B) Parasitism. C) Mutualism. D) Competition. Show Answer Correct Answer: C) Mutualism. 14. A heterotroph is A) A consumer; organism that obtains energy from the foods in consumes. B) An organism that eats others. C) Organism that obtains energy by eating plants. D) Organism that obtains energy by eating animals. Show Answer Correct Answer: A) A consumer; organism that obtains energy from the foods in consumes. 15. Nitrogen makes up ..... percent of the atmosphere. A) 66%. B) 78%. C) 90%. D) None of above. Show Answer Correct Answer: B) 78%. 16. Ecology studies A) Interactions between Biotic organisms. B) Interactions between Abiotic organisms. C) The interactions in different environments. D) The interaction between biatic factors and abiotic factors. Show Answer Correct Answer: D) The interaction between biatic factors and abiotic factors. 17. Which cycle ties Photosynthesis and cellular respiration? A) Carbon cycle. B) Nitrogen cycle. C) Phosphorus cycle. D) Water cycle. Show Answer Correct Answer: A) Carbon cycle. 18. Which is a tretiary consumer? A) Lion. B) Rabbit. C) Grasshopper. D) Oak Tree. Show Answer Correct Answer: A) Lion. 19. When humans EXHALE, we release ..... A) Oxygen. B) Carbon Dioxide. C) Nitrogen. D) Water. Show Answer Correct Answer: B) Carbon Dioxide. 20. Which of the following is the lowest on the food chain? A) Consumer. B) Prey. C) Producer. D) Apex Predator. Show Answer Correct Answer: C) Producer. ← 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