This quiz works best with JavaScript enabled. Home > Science > Earth > Ecology – Quiz 74 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 74 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is an increase of biodiversity over time, after a natural or manmade disturbance? A) Ecological recession. B) Climax recession. C) Ecological succession. D) Climax succession. Show Answer Correct Answer: C) Ecological succession. 2. Water evaporating from the surface of a lake moves from the ..... A) Atmosphere to the geosphere. B) Geosphere to the hydrosphere. C) Hydrosphere to the atmosphere. D) Atmosphere to the hydrosphere. Show Answer Correct Answer: C) Hydrosphere to the atmosphere. 3. Semiconductors are ..... A) Metal. B) Nonmetal. C) Metalloids. D) None of above. Show Answer Correct Answer: C) Metalloids. 4. It is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. A) Ecology. B) Ecosystem. C) Biome. D) Habitat. Show Answer Correct Answer: B) Ecosystem. 5. What is the difference between primary and secondary consumers in a food chain? A) Primary consumers eat producers, secondary consumers eat primary consumers. B) Primary consumers eat secondary consumers, secondary consumers eat producers. C) Primary consumers and secondary consumers eat the same organisms. D) There is no difference between primary and secondary consumers. Show Answer Correct Answer: A) Primary consumers eat producers, secondary consumers eat primary consumers. 6. Nitrogen fixation is A) The process of converting nitrogen gas into enegy. B) The process of converting nitrogen gas into ammonia. C) The process of conveting nitrogen gas into water. D) The process of converting nitrogen gas into a solid. Show Answer Correct Answer: B) The process of converting nitrogen gas into ammonia. 7. Which of the following examples shows the indirect value of biodiversity conservation? A) Obtaining lumber from forest trees. B) Obtaining medicinal products from plants. C) Generating an income for the guides of nature tours. D) Enjoying recreational activities in natural environments. Show Answer Correct Answer: D) Enjoying recreational activities in natural environments. 8. An aquarist takes half of the fish out of a tank, and the remaining fish grow larger and are healthier. Which factor was most likely affecting the fish? A) Water. B) Space. C) Shelter. D) Food. Show Answer Correct Answer: B) Space. 9. Your A) My. B) Our. C) Their. D) Your. Show Answer Correct Answer: D) Your. 10. Why are there fewer organisms in each level as you go up the energy pyramid? A) There is more energy available at higher levels. B) Higher levels have more mean animals. C) There is less energy availabe at higher levels. D) Coyotes get hungrier. Show Answer Correct Answer: C) There is less energy availabe at higher levels. 11. Which nitrogen cycle process breaks down atmospheric nitrogen (N2) and combines it with hydrogen or oxygen using bacteria or lightning strikes A) Nitrogen fixation. B) Ammonification. C) Nitrification. D) Denitrification. Show Answer Correct Answer: A) Nitrogen fixation. 12. Which of these is NOT an abiotic factor? A) Water. B) Air. C) Temperature. D) Bones. Show Answer Correct Answer: D) Bones. 13. Which of these is most likely to happen in an ecosystem if all of the primary consumers are removed from an ecosystem? A) Other primary consumers will take their places. B) Secondary consumers will decrease in numbers. C) Producers will decrease in numbers. D) None of above. Show Answer Correct Answer: B) Secondary consumers will decrease in numbers. 14. What role do decomposers play in the carbon cycle? A) Absorb carbon dioxide. B) Release carbon dioxide into atmosphere. C) Release carbon into the soil. D) Combustion. Show Answer Correct Answer: C) Release carbon into the soil. 15. When too much SO2 and NO2 are released into the atmosphere, this will result A) Nutrient rain. B) Soil erosion. C) Acid rain. D) Fewer clouds. Show Answer Correct Answer: C) Acid rain. 16. What are the main sources of water pollution? A) Agriculture (farming) and industry. B) Snails in water. Show Answer Correct Answer: A) Agriculture (farming) and industry. 17. Several owls live in a forest. The owls prey on mice. Hawks also prey on mice. Which might happen if several hawks move to the forest where the owls live? A) The number of owls will increase, and the number of hawks will decrease. B) The number of mice will increase, and the number of owls will decrease. C) The number of owls and hawks will increase. D) The number of owls and mice will decrease. Show Answer Correct Answer: D) The number of owls and mice will decrease. 18. What growth pattern describes a population whose growth rate slows or stops following a period of exponential growth? A) Logistic growth. B) Population growth. C) Exponential growth. D) Predator-prey cycle. Show Answer Correct Answer: A) Logistic growth. 19. In an ecosystem, living things are called ..... and non-living things are called ..... A) Biotic, abiotic. B) Abiotic, biotic. C) Organisms, decomposers. D) Herbivores, decomposers. Show Answer Correct Answer: A) Biotic, abiotic. 20. The lowest level of organization is called: A) Community. B) Organism. C) Biosphere. D) None of above. Show Answer Correct Answer: B) Organism. ← 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