This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Earth > Ecology – Quiz 43 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 43 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... the branch of science that studies how organisms interact with one another & with their environment. A) Geology. B) Astronomy. C) Ecology. D) Chemistry. Show Answer Correct Answer: C) Ecology. 2. When humans burn fossil fuels, most of the carbon quickly enters the as carbon dioxide. A) Water. B) Sun. C) Air. D) Atmosphere. Show Answer Correct Answer: D) Atmosphere. 3. Which means both species are benefitted? A) Parasitism. B) Commensalism. C) Mutualism. D) None of above. Show Answer Correct Answer: C) Mutualism. 4. The opposite of ugly A) Bad. B) Sad. C) Angry. D) Beautiful. Show Answer Correct Answer: D) Beautiful. 5. Plants and other photosynthetic organisms A) Tertiary consumer. B) Producer. C) Primary consumer. D) Secondary consumer. Show Answer Correct Answer: B) Producer. 6. Trophic Levels show the A) What grade each organism has achieved in the ecosystem. B) Position that an organism occupies in a food chain-what it eats, and what eats it. C) Part of the triangle the organism likes the most. D) Elevation the organism likes to live in. Show Answer Correct Answer: B) Position that an organism occupies in a food chain-what it eats, and what eats it. 7. What do omnivores eat? A) Animals. B) Plants and Animals. C) Plants. D) Dead Animals. Show Answer Correct Answer: B) Plants and Animals. 8. Which is an example of a biotic factor in the environment? A) The climate in the region. B) Flow of water in a river. C) Carnivores that consume other animals. D) Amount of helium gas in the air. Show Answer Correct Answer: C) Carnivores that consume other animals. 9. A type of consumer that only eats meat is a A) Omnivore. B) Decoposer. C) Carnivore. D) Herbivore. Show Answer Correct Answer: C) Carnivore. 10. Carbon cycles quickly between organisms and the atmosphere. A) True. B) False. Show Answer Correct Answer: A) True. 11. Only Found in Plants, this organelle has a rigid layer that surrounds cells of plants. Helps protect and support the cell A) Cell Wall. B) Chloroplasts. C) Cytoplasm. D) Cell membrane. Show Answer Correct Answer: A) Cell Wall. 12. Which of these is a population?1 all the insects in a rainforest2 all the tigers in a rainforest3 all the kapok trees in a rainforest A) 1, 2, and 3. B) 1 only. C) 1 and 2 only. D) 2 and 3 only. Show Answer Correct Answer: D) 2 and 3 only. 13. An omnivore eats A) Plants. B) Plants and animals. C) Animals only. D) Air. Show Answer Correct Answer: B) Plants and animals. 14. There is a lot of water in the ..... A) Wall. B) Sand. C) Bedroom. D) Sea. Show Answer Correct Answer: D) Sea. 15. What do all food chains end with A) Secondary consumer. B) Primary consumer. C) Decoposer. D) Producer. Show Answer Correct Answer: C) Decoposer. 16. What amount of percentage does the energy decrease as it goes up the pyramid? A) 1000%. B) 100%. C) 1%. D) 10%. Show Answer Correct Answer: D) 10%. 17. The competitive ..... principle states that two different species cannot occupy the same niche A) Exclusion. B) Ecosystem. Show Answer Correct Answer: A) Exclusion. 18. What are adaptations? A) The behaviors and physical characteristics that allow organisms to live successfully in their environments. B) The role of an organism in its habitat, or how it makes its living. C) The organism that is killed and eaten. D) The organism that benefits in a predator-prey relationship. Show Answer Correct Answer: A) The behaviors and physical characteristics that allow organisms to live successfully in their environments. 19. An organism's role in its community is its ....., and where it lives is its ..... A) Niche; habitat. B) Role in community; niche. C) Habitat; niche. D) Niche; role in the community. Show Answer Correct Answer: A) Niche; habitat. 20. What ecosystem does rock lichen belong to? A) To the macroecosystem. B) To the mesoecosystem. C) World ecosystem. D) Microecosystem. E) Ecosphere. Show Answer Correct Answer: A) To the macroecosystem. 21. A second-level (secondary) consumer CANNOT be which type of consumer? A) Carnivore. B) Omnivore. C) Herbivore. D) None of above. Show Answer Correct Answer: C) Herbivore. 22. The variety of ecosystems within a given region A) Trophic diversity. B) Ecosystem diversity. C) Genetic diversity. D) Species diversity. Show Answer Correct Answer: B) Ecosystem diversity. 23. What do we call a group of organisms of the same species? A) Trophic level. B) Population. C) Community. D) Ecosystem. Show Answer Correct Answer: B) Population. 24. For secondary succession of an ecosystem to occur, what must be present? A) Rock. B) Grass. C) Lichens. D) Soil. Show Answer Correct Answer: D) Soil. 25. What step of the water cycle occurs when clouds become too heavy? A) Precipitation. B) Runoff. C) Condensation. D) Evaporation. Show Answer Correct Answer: A) Precipitation. 26. Food chains are ..... A) A diagram showing what it eats and what eats it. B) A role in the community. C) The abiotic and biotic factors. D) The energy flow. Show Answer Correct Answer: A) A diagram showing what it eats and what eats it. 27. If a mutation introduces a new skin color in a lizard population, which factor might determine whether the frequency of the new allele will increase? A) How many other alleles are present. B) How many phenotypes are present in the population. C) Whether the mutation makes some lizards more fit for their environment than other lizards. D) Whether the mutation was caused by nature or by human intervention. Show Answer Correct Answer: C) Whether the mutation makes some lizards more fit for their environment than other lizards. 28. The energy found in nutrients originates from the ..... A) Stars. B) Food. C) No where. D) Sun. Show Answer Correct Answer: D) Sun. 29. One species feeds on another is a ..... A) Carnivore. B) Prey. C) Predator. D) Omnivore. Show Answer Correct Answer: C) Predator. 30. Choose the right meaning:club A) Club. B) Tin. C) To recycle. D) None of above. Show Answer Correct Answer: A) Club. 31. Which of the following situations will lead to an increase in population size for a species? A) Increased death rate. B) Decreased birth rate. C) Immigration. D) Emigration. Show Answer Correct Answer: C) Immigration. 32. In a forest, two trees are growing next to each other. Which two natural resources are they competing for in this area? A) Sunlight and water. B) Root length and strength. C) Cellular structure and function. D) Access to nesting birds and insects. Show Answer Correct Answer: A) Sunlight and water. 33. Many organisms get their energy from eating plants, vegetables, and fruits. Which of these is the source of energy for plants, vegetables, and fruits? A) Wind. B) Sunlight. C) Soil. D) Water. Show Answer Correct Answer: B) Sunlight. 34. All living (biotic) and nonliving (abiotic) things together create what? A) A population. B) A species. C) A community. D) An ecosystem. Show Answer Correct Answer: D) An ecosystem. 35. Estuary 2. Beach 3. Coral Reef 4. Ocean are all what kind of biome? A) Marine. B) Freshwater. Show Answer Correct Answer: A) Marine. 36. Aiden, James, and Benjamin went on a field trip to a forest reserve. They observed a linear way to display the flow of energy in the ecosystem. What is this called? A) Energy road. B) Food web. C) Food chain. D) Food line. Show Answer Correct Answer: C) Food chain. 37. When water ....., dew forms. A) Melts. B) Evaporates. C) Precipitates. D) Condenses. Show Answer Correct Answer: D) Condenses. 38. Climate is ..... A) Temperature and Sunlight. B) Temperature and Precipitation. C) Precipitation and Rainfall. D) Precipitation and Soil Content. Show Answer Correct Answer: B) Temperature and Precipitation. 39. An animal's job in its environment A) Competition. B) Habitat. C) Niche. D) Biome. Show Answer Correct Answer: C) Niche. 40. What is the role of decomposers in an Ecosystem? A) They recycle matter and nutrients to form fossil fuels. B) They are burn and release as carbon dioxide. C) Decomposers are responsible to turn oxygen into carbon dioxide. D) They recycle energy back to the sun. Show Answer Correct Answer: A) They recycle matter and nutrients to form fossil fuels. 41. This biome has the largest diversity (largest number of different kinds) of plant and animal species A) Deciduous Forest. B) Tundra. C) Tropical Rainforest. D) Desert. Show Answer Correct Answer: C) Tropical Rainforest. 42. This cycle deals with nitrification and nitrates A) Water. B) Nitrogen. C) Phosphorus. D) Carbon. Show Answer Correct Answer: B) Nitrogen. 43. Group of the SAME organisms living in an area A) Population. B) Community. C) Organism. D) Species. Show Answer Correct Answer: A) Population. 44. Global warming refers to an average ..... in the Earth's temperature, which in turn causes changes in ..... A) Increase, temperature. B) Increase, climate. C) Decrease, climate. D) Decrease, temperature. Show Answer Correct Answer: B) Increase, climate. 45. The land, sea and atmosphere on earth forms a A) Organism. B) Biome. C) Ecosystem. D) Biosphere. Show Answer Correct Answer: D) Biosphere. 46. Primary producers are the first trophic level in an ecosystem's food chain, food web, or energy pyramid. Which statement best explains why thisis true? A) Producers are usually smaller in size thanconsumers. B) Producers provide chemical energy for all consumers in the ecosystem. C) There are more producers than consumers. D) Consumers are always more complexorganisms than producers. Show Answer Correct Answer: B) Producers provide chemical energy for all consumers in the ecosystem. 47. If Timon is eating an insect he is a ..... consumer A) Primary. B) Secondary. C) Tertiary. D) None of above. Show Answer Correct Answer: B) Secondary. 48. What is the condition of the Earth's atmosphere at a certain time and place? A) Climate. B) Temperature. C) Weather. D) Air pressure. Show Answer Correct Answer: C) Weather. 49. Birds lay their nests on trees without hurting the trees. This relationship is A) Predation. B) Commensalism. C) Mutualism. D) Competition. Show Answer Correct Answer: B) Commensalism. 50. The most important way of an ecological lifestyle is ..... A) Proper waste disposal. B) Waste reduction. C) Waste recycling. D) None of above. Show Answer Correct Answer: B) Waste reduction. 51. To be able to use the materials locked up in dead organisms, the main role is played by ..... A) Scavenger. B) Decoposer. C) Secondary consumer. D) Producer. Show Answer Correct Answer: B) Decoposer. 52. High biodiversity helps an ecosystem be more sustainable because: A) More species with different adaptations are better able to survive a disaster. B) More species can survive a disease. C) There is plenty of food for everyone. D) All of the above. Show Answer Correct Answer: D) All of the above. 53. Nitrogen fixation is the process in which certain bacteria convert nitrogen gas into A) Liquid nitrogen. B) Ammonia. C) Nitrites. D) Nitrates. Show Answer Correct Answer: B) Ammonia. 54. A species is defined as endangered when it A) Suffers from damage to its habitat. B) Suffers from disease or predation. C) When there are hazards to the continued life of the species. D) All of the above. Show Answer Correct Answer: D) All of the above. 55. A symbiotic relationship where one organism benefits and the other one doesn't benefit and isn't harmed. A) Mutualism. B) Commensalism. C) Parasitism. D) None of above. Show Answer Correct Answer: B) Commensalism. 56. What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere? A) Denitrification. B) Assimilation. C) Ammonification. D) Fixation. Show Answer Correct Answer: A) Denitrification. 57. When an animal dies, the once-living matter from the animal's body A) Regenerates so the animal can live again. B) Remains exactly the same for millions of years. C) Is broken down and passes into the soil and air. D) Disintegrates into small particles that eventually disappear. Show Answer Correct Answer: C) Is broken down and passes into the soil and air. 58. Dirty air, water and soil A) Pollution. B) Pollute. C) Floor. D) Environment. Show Answer Correct Answer: A) Pollution. 59. An organism that makes its own food for energy A) Producer. B) Prey. C) Consumer. D) Predator. Show Answer Correct Answer: A) Producer. 60. What is the thinnest layer of the Earth? A) Mantle. B) Inner core. C) Outer core. D) Crust. Show Answer Correct Answer: D) Crust. ← 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