This quiz works best with JavaScript enabled. Home > Science > Earth > Ecology – Quiz 105 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 105 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A nonnative organism that disrupts or changes the balance of an ecosystem A) Threatened species. B) Endangered species. C) Extinct species. D) Invasive species. Show Answer Correct Answer: D) Invasive species. 2. What is not true about marine life? A) Lives in water. B) Lives in salt water. C) Lives in freshwater. D) None of above. Show Answer Correct Answer: C) Lives in freshwater. 3. The number and VARIETY of organisms in a given area during a specific period of time. A) Biosphere. B) Population. C) Community. D) Biodiversity. Show Answer Correct Answer: D) Biodiversity. 4. The area where the fresh water of a river meets the salt water of the ocean. Commonly has severe changes in salinity depending on the tides A) Mangrove Swamp. B) Marsh. C) Estuary. D) Lake. Show Answer Correct Answer: C) Estuary. 5. What is the most abundant gas in the atmosphere? A) Hydrogen. B) Oxygen. C) Helium. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 6. Recycling of garbage, solid wastes and certain crops for generating energy has been accomplished already. A) True. B) False. Show Answer Correct Answer: A) True. 7. The variety of environments produced by the interaction between biotic and abiotic factors. (ex:lakes, ponds, and rivers are all freshwater ecosystems) A) Ecosystem Diversity. B) Genetic Diversity. C) Species Diversity. D) None of above. Show Answer Correct Answer: A) Ecosystem Diversity. 8. One type of air pollution is the addition of carbon dioxide gas into the air. This causes the ..... A) Global warming. B) Acid rain. C) Harmful rays. D) None of above. Show Answer Correct Answer: A) Global warming. 9. New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to A) Reduce the use of nonrenewable resources. B) Increase the rate of air pollution. C) Reduce the rate of homeostasis in organisms. D) Cause a loss of biodiversity in the rain forests. Show Answer Correct Answer: A) Reduce the use of nonrenewable resources. 10. An example of a producer is A) Tiger. B) A tree. C) Bacteria. D) Fungi. Show Answer Correct Answer: B) A tree. 11. Trophic levels are represented by A) Squares. B) Circles. C) Pyramids. D) Lines. Show Answer Correct Answer: C) Pyramids. 12. Drought-resistant plants that reduce water evaporation A) Hygrophytes. B) Hydatophytes. C) Sclerophytes. D) Mesofitter. E) Succulents. Show Answer Correct Answer: C) Sclerophytes. 13. Which of the following would NOT be a producer? A) Grass. B) Beetles. C) Trees. D) Shrubs. Show Answer Correct Answer: B) Beetles. 14. Which is an example of population? A) All the mahogany trees growing in a forest. B) All the plants & animals living in a pond. C) All of the species of animals in Africa. D) All of the people born in a country over a 100 year period of time. Show Answer Correct Answer: A) All the mahogany trees growing in a forest. 15. Which factor is a density-dependent limiting factor on the population of a species? A) Seasonal variation. B) Natural disasters. C) Unusual weather. D) Predation. Show Answer Correct Answer: D) Predation. 16. ..... and ..... crate an ecosystem A) Biotic and abiotic. B) Organism and Community. C) 3 fish and 2 cats. D) Biotic and Population. Show Answer Correct Answer: A) Biotic and abiotic. 17. Which level of organization is the most complex? A) Organism. B) Population. C) Community. D) Ecosystem. Show Answer Correct Answer: D) Ecosystem. 18. Make their own food A) Producers. B) Consumers. C) Decomposers. D) None of above. Show Answer Correct Answer: A) Producers. 19. Extinct-extinct to run out of-end A) Right. B) Wrong. C) Partially correct. D) None of above. Show Answer Correct Answer: A) Right. 20. A gas produced by plants during photosynthesis that animals use for respiration. A) Oxygen. B) Carbon Dioxide. C) Methane. D) Sulphur. Show Answer Correct Answer: A) Oxygen. ← 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