This quiz works best with JavaScript enabled. Home > Science > Earth > Ecology – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 28 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In the nitrogen cycle, denitrifying bacteria convert A) Atmospheric nitrogen to nitrates. B) Nitrates to atmospheric nitrogen. C) Ammonium compounds to nitrates. D) Atmospheric nitrogen to ammonium compounds. Show Answer Correct Answer: B) Nitrates to atmospheric nitrogen. 2. What is the correct decomposer? A) Fungus. B) Sun. C) Tree. D) Weather. Show Answer Correct Answer: A) Fungus. 3. A food chain is: A) An animal that eats only plants. B) A diagram that shows how energy moves from one organism to another. (Grass>Mouse>Owl). C) An animal that is hunted and eaten by another animal. D) None of above. Show Answer Correct Answer: B) A diagram that shows how energy moves from one organism to another. (Grass>Mouse>Owl). 4. The second link in a food chain is a ..... A) Consumer. B) Producer. C) Herbivore. D) Carnivore. Show Answer Correct Answer: C) Herbivore. 5. The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that A) . ecosystems are interconnected and human action can alter ecosystem equilibrium. B) Recycling programs have failed to conserve biotic resources. C) Natural processes can alter ecosystem stability. D) Direct harvesting practices have led to irreversible destruction of ecosystems. Show Answer Correct Answer: A) . ecosystems are interconnected and human action can alter ecosystem equilibrium. 6. Environmental factor boundary where life is impossible A) Maximum. B) Minimum. C) Danger points. D) Pessimum. E) Optimum. Show Answer Correct Answer: C) Danger points. 7. An environment that is more productive and more resistant to stress and changes is? A) Biodiverse. B) Rich. C) Rich and Biodiverse. D) Neither. Show Answer Correct Answer: C) Rich and Biodiverse. 8. A group of individuals of the same species that live in the same ecosystem is considered a A) Organism. B) Population. C) Community. D) Animals. Show Answer Correct Answer: B) Population. 9. Ozone depleting substances have been depleting the ozone layer since the 1970's. Which example could be classified as a result of a hole in the ozone layer? A) Less rainfall occurs over the Indian Ocean. B) More ultraviolet radiation reaches Earth's surface. C) More pollution is released into Earth's atmosphere. D) Ocean current circulation has been greatly affected. Show Answer Correct Answer: B) More ultraviolet radiation reaches Earth's surface. 10. What would happen within a few months after the formation of a volcanic island? A) Grasses would appear. B) Trees and shrubs would grow. C) Lichen and moss would colonize the rocks. D) Organic soil would cover the island. Show Answer Correct Answer: C) Lichen and moss would colonize the rocks. 11. Intraspecific competition means A) Organisms from different species compete. B) Organisms compete and one survives. C) Organisms from the same species compete. D) Organisms share resources. Show Answer Correct Answer: C) Organisms from the same species compete. 12. All of the following contribute directly to soil formation EXCEPT A) Lichens. B) Decomposition of organisms. C) Volcanic eruptions. D) Erosion of rock by weather. Show Answer Correct Answer: C) Volcanic eruptions. 13. Non-living things in the environment are called ..... A) Population. B) Abiotic. C) Parasitism. D) Ecology. Show Answer Correct Answer: B) Abiotic. 14. A worm that breaks down soil, waste, and dead things is a ..... A) Prey. B) Decomposer. C) Predator. D) Abiotic. Show Answer Correct Answer: B) Decomposer. 15. A relationship between two organisms in which one benefits and the other is harmed. A) Mutualism. B) Commensalism. C) Parasitism. D) None of above. Show Answer Correct Answer: C) Parasitism. 16. A leaf A) Biotic. B) Abiotic. Show Answer Correct Answer: A) Biotic. 17. Producer = grassPrimary consumer = squirrel, deer, rabbitSecondary consumer = fox, bear In which biome would you most likely see this food chain? A) Taiga. B) Tundra. C) Savanna. D) Deciduous forest. Show Answer Correct Answer: D) Deciduous forest. 18. Which of the following in NOT a characteristic of eukaryotic cells? A) DNA is separated from the cytoplasm by a nuclear membrane. B) Large. C) Complex. D) Lack membrane-bound organelles. Show Answer Correct Answer: D) Lack membrane-bound organelles. 19. Organisms in an ecosystem can have the same: A) Niche. B) Habitat. Show Answer Correct Answer: B) Habitat. 20. A limiting factor ..... A) Is extinct. B) Means overpopulated. C) Is endangered. D) Is Something that stops the growth or causes a decline in population. Show Answer Correct Answer: D) Is Something that stops the growth or causes a decline in population. ← 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