This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Earth > Ecology – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 20 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A clownfish living in sea anemone is an example of what type of relationship? A) Mutualism. B) Predation. C) Parasitism. D) Commensalism. Show Answer Correct Answer: D) Commensalism. 2. The air we breathe is only ..... % oxygen. A) 90. B) 78. C) 10. D) 21. Show Answer Correct Answer: D) 21. 3. Plants with spines and waxy leaves are well suited for life in which environment? A) Desert. B) Temperate forest. C) Grassland. D) Tropical Rainfroest. Show Answer Correct Answer: A) Desert. 4. Which of these is Abiotic? A) A rock. B) A downed Tree. C) A Bush. D) A mouse. Show Answer Correct Answer: A) A rock. 5. Organisms that break down material A) Predators. B) Consumers. C) Producers. D) Decomposers. Show Answer Correct Answer: D) Decomposers. 6. Abiotic factors are the ..... aspects of the environment. A) Producers. B) Nonliving. Show Answer Correct Answer: B) Nonliving. 7. Which of the following would apply to invasive species? A) They are able to outcompete other native species. B) They ultimately increase the biodiversity of the habitat in which they are introduced. C) They typically only apply to plant species like weeds. D) They stabilize the habitats of other native species. Show Answer Correct Answer: A) They are able to outcompete other native species. 8. Which of the following lists contains only abiotic factors? A) Water, air, temperature. B) Grass, air, people. C) Trees, fish, polar bears. D) Grass, water, sand. Show Answer Correct Answer: A) Water, air, temperature. 9. Which of these is shown from the smallest to largest? A) Community, ecosystem, biosphere, population, organism. B) Species, population, community, ecosystem, biome, biosphere. C) Biosphere, biome, ecosystem, community, population, species. D) Population, ecosystem, community, organism, biosphere. Show Answer Correct Answer: B) Species, population, community, ecosystem, biome, biosphere. 10. What is lost between trophic levels in ecosystems and cannot be recycled? A) Nitrogen. B) Carbon compounds. C) Biomass. D) Heat. Show Answer Correct Answer: D) Heat. 11. Mushrooms are an example of this Kingdom? A) Fungi. B) Archea. C) Protista. D) The animal. Show Answer Correct Answer: A) Fungi. 12. True or False:A lack of light in the Benthic zone is a problem because producers are unable to photosynthesize and thus a food web can not be supported. A) False. B) True. Show Answer Correct Answer: B) True. 13. Plants growing under direct sunlight are known as A) Heliophytes. B) Psamophytes. C) Dicots. D) Sciophytes. Show Answer Correct Answer: A) Heliophytes. 14. Primary succession may occur ..... A) On an abandoned farm field. B) On a lot bulldozed for a subdivision. C) Due to deforestation by tree farmers. D) On an island formed by a volcanic eruption. Show Answer Correct Answer: D) On an island formed by a volcanic eruption. 15. A brown bear eats roots, berries, nuts, fish, insects, and mammals. What category is a brown bear? A) Carnivore. B) Herbivore. C) Decoposer. D) Omnivore. Show Answer Correct Answer: D) Omnivore. 16. If the death rate of a population is greater than the birthrate, the population decreases. A) True. B) False. Show Answer Correct Answer: A) True. 17. What is an example of a commensalism relationship? A) The fungi that causes ringworm grows on human skin. B) An oak tree grows beside a pine tree. Eventually, the oak tree overshadows the pine tree, and the pine tree dies. C) Egrets follow cattle and eats insects that are disturbed by the cattle's grazing. Egrets benefit from the cattle but the cattle receives no benefit. D) A lion stalks, kills, and eats an antelope. Show Answer Correct Answer: C) Egrets follow cattle and eats insects that are disturbed by the cattle's grazing. Egrets benefit from the cattle but the cattle receives no benefit. 18. Which of the following is NOT a nonliving thing? (Hint:which one is living-a biotic factor?) A) Rocks. B) Sun. C) Soil. D) Plants. Show Answer Correct Answer: D) Plants. 19. What is antibody? A) A chemical made by the immune system that makes it easier for white blood cells to destroy pathogens. B) A chemical that causes your body to react as if you had met a pathogen. C) A type of white blood cell that destroys bacteria by engulfing or consuming them. D) . An early antibiotic which works against foreign matter in your body. Show Answer Correct Answer: A) A chemical made by the immune system that makes it easier for white blood cells to destroy pathogens. 20. A lion and a cheetah attempt to occupy the same niche. The more aggressive lion survives; the cheetah does not. A) Density-Dependent:Competition. B) Density-Independent:Predator-Prey. C) Density-Independent:Competition. D) Density-Dependent:Predator-Prey. Show Answer Correct Answer: A) Density-Dependent:Competition. 21. In 1840 Yu. What is Liebig's proposed law called? A) Minimum. B) Endurance. C) Save. D) Stability. E) There is no correct answer. Show Answer Correct Answer: A) Minimum. 22. What are the ecological levels of organization from smallest to the largest? A) Organism, population, community, ecosystem, ecosphere. B) Organism, community, population, ecosystem, biosphere. C) Organism, community, population, ecosystem, ecosphere. D) Organism, population, community, ecosystem, , biosphere. Show Answer Correct Answer: D) Organism, population, community, ecosystem, , biosphere. 23. Which is an example of where primary succession could occur? A) A glacier melts and exposes new rocks. B) Natural fire burns a prairie. C) A corn field is abandoned and left to overgrow. D) Flood covers a piece of land. Show Answer Correct Answer: A) A glacier melts and exposes new rocks. 24. The study of how living things interact with each other and their environment A) Population. B) Ecology. C) Niche. D) Ecosystem. Show Answer Correct Answer: B) Ecology. 25. Which of the following describes the flow of energy in an ecosystem? A) Sunlight-PC-SC-TC-producer. B) TC-SC-PC-producer-sunlight. C) Sunlight-producer-PC-SC-TC. D) Producer-PC-SC-TC-sunlight. Show Answer Correct Answer: C) Sunlight-producer-PC-SC-TC. 26. Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete with plants growing nearby? A) By attracting herbivores to the other plants. B) By suppressing the growth of the other plants. C) By limiting the amount of water available to the other plants. D) By increasing the photosynthesis rates in the other plants. Show Answer Correct Answer: B) By suppressing the growth of the other plants. 27. Which of these nitrogen cycle processes converts atmospheric nitrogen to a soil form of nitrogen that is usable by plants? A) Ammonification. B) Assimilation. C) Denitrification. D) Nitrogen fixation. E) Nitrification. Show Answer Correct Answer: D) Nitrogen fixation. 28. The release of water vapor by plants A) Photosynthesis. B) Water cycle. C) Transpiration. D) Respiration. Show Answer Correct Answer: C) Transpiration. 29. I want to eat. I am ..... A) Sad. B) Tired. C) Thirsty. D) Hungry. Show Answer Correct Answer: D) Hungry. 30. I am a consumer that eats both plants and animals. A) Carnivore. B) Omnivore. C) Herbivore. D) None of above. Show Answer Correct Answer: B) Omnivore. 31. A ..... breaks down waste or dead organisms and recycles nutrients. A) Producer. B) Omnivore. C) Decoposer. D) Consumer. Show Answer Correct Answer: C) Decoposer. 32. Biotic factors are things such as, animals and plants A) True. B) False. Show Answer Correct Answer: A) True. 33. What do you call organisms that can make their own food? A) Heterotrophs. B) Autotrophs. C) Trophies. D) None of above. Show Answer Correct Answer: B) Autotrophs. 34. Ms. Daley takes her class on a field trip to a pond. The class sees a bald eagle and a salamander near the pond. How are these two animals alike? A) They both have offspring that is very different from the adults. B) They both lay eggs. C) They both are warm-blooded. D) They both are able to breathe through their skin. Show Answer Correct Answer: B) They both lay eggs. 35. The process of plants using energy from the sun to create the first trophic level is called? A) Chemosynthesis. B) Primary Producers. C) Photosynthesis. D) Cellular Respiration. Show Answer Correct Answer: C) Photosynthesis. 36. This biome has four equal seasons (winter, spring, summer, fall). Summers are hot and winters are cold. We live in this biome. A) Grassland. B) Marine. C) Deciduous Forest. D) Coniferous Forest. Show Answer Correct Answer: C) Deciduous Forest. 37. Humans are initially babies and then can develop into children who can run. This is because living things is ..... A) Growth. B) Movement. C) Respiration. D) Excretion. Show Answer Correct Answer: A) Growth. 38. Which of the following is NOT an example of an abiotic factor? A) Pebbles. B) Bird. C) Sunlight. D) Ocean. Show Answer Correct Answer: B) Bird. 39. A certain species of bird follows cows through a pasture and eats insects that cows stir up. The cows are not affected. Which type of symbiotic relationship is described? A) Commensalism. B) Predation. C) Mutualism. D) Parasitism. Show Answer Correct Answer: A) Commensalism. 40. Omnivores are..... A) Consumers that eat both plants and animals. B) Species that break down waste material and dead animals to store energy. C) Animals that eat only plants. D) Animals that eat only animals. Show Answer Correct Answer: A) Consumers that eat both plants and animals. 41. What kind of factor:disease? A) Density-independent. B) Density-dependent. Show Answer Correct Answer: B) Density-dependent. 42. Green plants are called ..... A) Consumers. B) Omnivores. C) Herbivores. D) Producers. Show Answer Correct Answer: D) Producers. 43. This is the formula for which process? 6H2O + 6CO2 $\rightarrow$ C6H12O6 + 6O2 A) Cellular Respiration. B) Acidification. C) Glycolysis. D) Photosynthesis. Show Answer Correct Answer: D) Photosynthesis. 44. What is common between the process of respiration and the process of burning fuel is that in both A) Ignition is needed. B) It produces energy from organic compounds. C) Methane is released. D) .There is a constant need for oxygen for the process to occur. Show Answer Correct Answer: D) .There is a constant need for oxygen for the process to occur. 45. When an organism dies, the nitrogen in its body A) Can never be reused by other living things. B) Is immediately released into the atmosphere. C) Is released by the action of decomposers. D) None of the above. Show Answer Correct Answer: C) Is released by the action of decomposers. 46. Decomposers ..... A) Can be considered producers because they grow in the ground. B) Are mostly Abiotic. C) Provide most of the Earth's energy. D) Recycle nutrients in the ecosystem. Show Answer Correct Answer: D) Recycle nutrients in the ecosystem. 47. The temperate decisuous forest, the tropical rain forest, the desert, and the tundra are all examples of ..... A) Ecosystems. B) Communities. C) Biomes. D) The biopshere. Show Answer Correct Answer: C) Biomes. 48. Which of the following is an example of a limiting factor? A) TEMPERATURE. B) AMOUNT OF FOOD. C) DISEASE. D) ALL THE ABOVE. Show Answer Correct Answer: D) ALL THE ABOVE. 49. Which is NOT an autotroph A) Tree. B) Plant. C) Mushroom. D) None of above. Show Answer Correct Answer: C) Mushroom. 50. This is a geographic area where plants, animals, and other organisms work together to form a bubble of life. A) Ecosystem. B) Biotic. C) Landfill. D) None of above. Show Answer Correct Answer: A) Ecosystem. 51. Which biome is characterized by well defined seasons and trees that lose their leaves in their winter? A) Taiga. B) Tundra. C) Tropical rainforests. D) Deciduous forests. E) Savannah. Show Answer Correct Answer: D) Deciduous forests. 52. Keystone species is A) A species that lives at the Keystone ski resort in Colorado. B) A species that, if removed will cause a trophic cascade and disrupt the ecosystem. C) A species that saves the environment. D) None of above. Show Answer Correct Answer: B) A species that, if removed will cause a trophic cascade and disrupt the ecosystem. 53. What do we call a type of consumer that only eats the remains of dead organisms? A) Scavenger. B) Third level consumer. C) Consumer. D) Omnivore. Show Answer Correct Answer: A) Scavenger. 54. What is the most widely used renewable source of electricity in the US today? A) Tidal power. B) Hydroelectric. C) Biomass fuels. D) Solar. Show Answer Correct Answer: B) Hydroelectric. 55. All the individuals of the same species in a certain area are termed a(n) A) Population. B) Ecosystem. C) Community. D) Species. Show Answer Correct Answer: A) Population. 56. Kai, Lily, and Abigail are studying different levels of ecological organization. They came across the terms Individual, Population, Ecosystem, and Niche. They are confused about which one is not a hierarchy of ecological organization. Can you help them? A) Ecosystem. B) Individual. C) Niche. D) Population. Show Answer Correct Answer: C) Niche. 57. Which of the following best describes a community? A) Sharks, groupers, anemones and shrimp on a coral reef. B) Decorator crabs on the seafloor. C) Loggerhead sea turtles in Atlantic. D) Prairie grassland in Wyoming. Show Answer Correct Answer: A) Sharks, groupers, anemones and shrimp on a coral reef. 58. States that two different species cannot occupy the same niche in the same place for very long A) Competitive exclusion principle. B) Biotic factor. Show Answer Correct Answer: A) Competitive exclusion principle. 59. An organism that breaks down dead material A) Producer. B) Consumer. C) Decoposer. D) None of above. Show Answer Correct Answer: C) Decoposer. 60. What type of organism can make its own food? A) A producer. B) A decomposer. C) All of the above. D) A consumer. Show Answer Correct Answer: A) A producer. ← PreviousNext →Related QuizzesScience QuizzesGeneral Knowledge QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books