This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 26 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 26 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A habitat is..... A) The place or kind of place in which an animal or plant naturally lives. B) Is how plants produce their own food. C) Is an animal that only eats meat. D) The place where only one animal lives. Show Answer Correct Answer: A) The place or kind of place in which an animal or plant naturally lives. 2. Two species of fish live in the same pond. Which of the following would increase competition between these two species of fish? A) Habitat temperature increases. B) Population of birds that eat the fish increases. C) Number of food plants the fish eat increases. D) Water level in the pond decreases. Show Answer Correct Answer: D) Water level in the pond decreases. 3. A biotic thing in an environment is one that A) Is or was alive. B) Is non-living (never has been alive). Show Answer Correct Answer: A) Is or was alive. 4. How does energy flow in an energy pyramid? A) Top to bottom. B) Bottom to top. C) Left to right. D) Right to left. Show Answer Correct Answer: B) Bottom to top. 5. Which of the following processes does not return CO2 into the atmosphere? A) Cellular respiration. B) Photosynthesis. C) Burning fossil fuels. D) Decomposition. Show Answer Correct Answer: B) Photosynthesis. 6. Air ..... is a serious problem in cities. A) Exhaust fumes. B) Recycle. C) Oxygen. D) Pollution. Show Answer Correct Answer: D) Pollution. 7. Carrying Capacity A) How many organisms an ecosystem can hold and sustain. B) Means the ecosystem is overpopulated. C) How much candy you can carry. D) Is an endangered species. Show Answer Correct Answer: A) How many organisms an ecosystem can hold and sustain. 8. Biotic factors would include all but ..... A) Humans. B) Fish. C) Trees. D) Soil. Show Answer Correct Answer: D) Soil. 9. What is the ultimate ORIGINAL source of energy for living things A) Sugar. B) Sun. C) Moon. D) Carbon Dioxide. Show Answer Correct Answer: B) Sun. 10. Which element is the most abundant in the atmosphere? A) Oxygen. B) Nitrogen. C) Phosphorus. D) Sulfur. Show Answer Correct Answer: B) Nitrogen. 11. What is VARIATION? A) The gradual change of species over time. B) Differences in traits between members of the same species. C) Organisms develop in similar ways in the womb. D) Survival of the fittest. Show Answer Correct Answer: B) Differences in traits between members of the same species. 12. Which of the following is MOST likely an indirect value of biodiversity conservation? A) Obtaining lumber from forest trees. B) Obtaining medicinal products from plants. C) Enjoying recreational activities in natural environments. D) Generating an income for the guides of nature tours. Show Answer Correct Answer: C) Enjoying recreational activities in natural environments. 13. Mutualism A) A relation in which two organisms live closely together. B) Parasite benefits host is hurt. C) One species benefits the other is neither hurt nor helped,. D) Both species benefit. Show Answer Correct Answer: D) Both species benefit. 14. Which shows a complete picture of the flow of energy through an ecosystem. A) Food Chain. B) Food Web. Show Answer Correct Answer: B) Food Web. 15. Multiple organisms of the same species describes a A) Organism. B) Population. C) Community. D) Ecosystem. Show Answer Correct Answer: B) Population. 16. Decayed organic matter in soil A) Humus. B) Clay. C) Silt. D) None of above. Show Answer Correct Answer: A) Humus. 17. A plant has about 10, 000 J of energy. How much energy would a tertiary consumer get from this plant? A) 1J. B) 10J. C) 100J. D) 1000J. Show Answer Correct Answer: B) 10J. 18. What type of symbiosis? *The plover picks and eats scraps of meat from the crocodile's teeth. *The crocodile gets a free teeth-cleaning! A) Commensalism. B) Mutualism. C) Parasitism. D) Predation. Show Answer Correct Answer: B) Mutualism. 19. What is the branch of science that deals with the study of living things and their relationship with the environment? A) Anthropology. B) Ecology. C) Ecosystems. D) None of above. Show Answer Correct Answer: B) Ecology. 20. Which of the following best describes how carbon dioxide in the atmosphere is changed by living organisms? A) It is absorbed by plants during photosynthesis. B) It is exchanged for water vapor through the process of respiration. C) It is created when factory workers burn fossil fuels. D) It is used by plants and animals to convert organic carbon to oxygen. Show Answer Correct Answer: A) It is absorbed by plants during photosynthesis. ← 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