This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Tick (/) the correct sequence that describes the flow of energy in an ecosystem. A) Carnivore $\rightarrow$ herbivore $\rightarrow$ plant $\rightarrow$ Sun. B) Herbivore $\rightarrow$ plant $\rightarrow$ carnivore $\rightarrow$ Sun. C) Sun $\rightarrow$ plant $\rightarrow$ carnivore $\rightarrow$ herbivore. D) Sun $\rightarrow$ plant $\rightarrow$ herbivore $\rightarrow$ carnivore. Show Answer Correct Answer: D) Sun $\rightarrow$ plant $\rightarrow$ herbivore $\rightarrow$ carnivore. 2. For fallen leaves, vegitable wastes the ecofriendly action is A) Convert into compost manure. B) Left as it is. C) Burning them. D) Thrown into dustbin. Show Answer Correct Answer: A) Convert into compost manure. 3. A farmer plants two species of grass with similar nutrient needs on the same small plot of land. What kind of interaction will most likely occur between the two species? A) Commensalism. B) Parasitism. C) Competition. D) Mutualism. Show Answer Correct Answer: C) Competition. 4. What is the term used to describe the diverse range of living organisms found in a particular environment? A) Biome. B) Niche. C) Biodiversity. D) Ecosystem. Show Answer Correct Answer: C) Biodiversity. 5. When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. Which characteristic of life does this represent? A) All living things use energy. B) All living things contain cells. C) All living things maintain homeostasis. D) All living things grow. Show Answer Correct Answer: C) All living things maintain homeostasis. 6. What is ecology? A) The scientific study about interaction among organisms and their interaction. B) The study of living things. C) Study of the organisms's habitat. D) Study of matter. Show Answer Correct Answer: A) The scientific study about interaction among organisms and their interaction. 7. What are the different stages of ecological succession? A) Primary succession and secondary succession. B) Initial succession and final succession. C) First succession and last succession. D) Early succession and late succession. Show Answer Correct Answer: A) Primary succession and secondary succession. 8. The study of the relationship between plants, animals, and their environment is called: A) Biology. B) Ecology. C) Sociology. D) Psychology. Show Answer Correct Answer: B) Ecology. 9. The total of all different forms of genes present in a particular species. A) Ecosystem Diversity. B) Biosphere diversity. C) Species Diversity. D) Genetic Diversity. Show Answer Correct Answer: D) Genetic Diversity. 10. Mushrooms get their energy by: A) Consuming living organisms. B) Converting energy in their surroundings in chemical energy. C) Internally digesting deceased organisms. D) Externally digesting deceased organisms. Show Answer Correct Answer: D) Externally digesting deceased organisms. 11. Why is biodiversity important for ecosystem productivity? A) Only affects the aesthetic value of the ecosystem. B) It has no impact on productivity. C) Decreases resilience to diseases. D) Increases resilience and productivity. Show Answer Correct Answer: D) Increases resilience and productivity. 12. What is the maximum number of individuals of one species that the environment can support? A) Carrying capacity. B) Population. C) Top capacity. D) Overload capacity. Show Answer Correct Answer: A) Carrying capacity. 13. What does the Mandingly model focus on? A) Next Generation model of ecosystems and biodiversity. B) Historical analysis of human civilizations. C) Development of new computer technologies. D) Study of marine life exclusively. Show Answer Correct Answer: A) Next Generation model of ecosystems and biodiversity. 14. A consumer that eats ONLY plants is a ..... A) Carnivore. B) Omnivore. C) Predator. D) Herbivore. Show Answer Correct Answer: D) Herbivore. 15. The first species to colonize barren areas A) Pioneer adapter. B) First species. C) Pioneer species. D) New life. Show Answer Correct Answer: C) Pioneer species. 16. The place in which an organism lives A) Ecosystem. B) Population. C) Habitat. D) Niche. Show Answer Correct Answer: C) Habitat. 17. Molecules can be passed from one organism to another through the food ..... A) Processor. B) Chain. C) Store. D) Web. Show Answer Correct Answer: D) Web. 18. Density-dependent factor: A) Flood. B) Earthquake. C) Drought. D) Disease. Show Answer Correct Answer: D) Disease. 19. Which is the best definition of ecology? A) The study of how living things interact with each other and with their environment. B) The study of how live things evolve and change to meet their environmental needs. C) The study of the chemistry of living things. D) The study of how living things function in their environmet. Show Answer Correct Answer: A) The study of how living things interact with each other and with their environment. 20. Where in the food chain will you place a shark? A) Decomposers. B) Producers. C) Primary consumers. D) Secondary consumers. Show Answer Correct Answer: D) Secondary consumers. 21. A deer population has significantly increased, the best hypothesis is A) Organisms that rely on similar food sources migrated to the area. B) Competition increased. C) The deer's main predator has been eliminated. D) Decreased water levels of local ponds. Show Answer Correct Answer: C) The deer's main predator has been eliminated. 22. Final Trophic Level A) Primary Consumer. B) Tertiary Consumer. C) Producer. D) Secondary Consumer. Show Answer Correct Answer: B) Tertiary Consumer. 23. Why does increasing producers increase the populations of all trophic levels? A) With more energy available the carrying capacity increases. B) Producers do not have a large impact on population sizes. C) Producers help keep predator populations in check. D) Producers increase the size of a habitat. Show Answer Correct Answer: A) With more energy available the carrying capacity increases. 24. When must the planning of the mine reclamation process occur? A) Before mining begins. B) After mining has begun. C) During the mining process. D) After mining has ended. Show Answer Correct Answer: A) Before mining begins. 25. There is a population of 75 wolves in a forest that has a carrying capacity of 120. What is the maximum population growth rate if the population grows to 92 in one year? A) 0.604. B) 1.00. C) 0.523. D) 0.833. Show Answer Correct Answer: A) 0.604. 26. A living thing that can't make its own food and must eat other living things. A) Consumer. B) Instinct. C) Decomposer. D) Producer. Show Answer Correct Answer: A) Consumer. 27. The part of the Earth in which living things exist and interact A) Terrestrial. B) Biodiversity. C) Bio. D) Biosphere. Show Answer Correct Answer: D) Biosphere. 28. What term describes all living factors in an environment? A) Biotic. B) Biological. C) Zoological. D) Abiotic. Show Answer Correct Answer: A) Biotic. 29. Which of the following describes amino acid? A) Carried by mRNA and is a copy of DNA. B) Carried by tRNA and building blocks for proteins. C) Building blocks for DNA. D) None of the above. Show Answer Correct Answer: B) Carried by tRNA and building blocks for proteins. 30. If we talk about high biodiversity, few deciduous trees, tall grass, we are referring to: A) The Mediterranean forest. B) The rainforest (jungle). C) The savannah. D) The deciduous forest. Show Answer Correct Answer: B) The rainforest (jungle). 31. Cactus, snake, coyote, sagebrush, and hare are all examples of ..... within an ecosystem. A) Producers. B) Consumers. C) Abiotic factors. D) Biotic factors. Show Answer Correct Answer: D) Biotic factors. 32. What is the source of all the food in an ecosystem A) Consumers. B) Decomposers. C) Producers. D) None of the above. Show Answer Correct Answer: C) Producers. 33. Sunlight, soil, temperature, and water are all examples of biotic factors A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 34. What complements extinction in the processes discussed? A) Speciation. B) Natural selection. C) Evolution. D) Adaptation. Show Answer Correct Answer: A) Speciation. 35. Name one example of a carnivore. A) Elephant. B) Giraffe. C) Lion. D) Penguin. Show Answer Correct Answer: C) Lion. 36. To maintain BIODIVERSITY we need to use ecosystems in a sustainable way. What does a sustainable way mean? A) Using all of the resources in the ecosystem to help energy flow. B) Not overusing the resources in the ecosystem, so future land development can still occur in those areas. C) Using all of the resources in the ecosystem to help the natural cycles. D) Not overusing the resources in the ecosystem, so future generations can also meet their needs. Show Answer Correct Answer: D) Not overusing the resources in the ecosystem, so future generations can also meet their needs. 37. A bird hitches a free, safe ride on the back of a grey elephant. The elephant doesn't seem to mind and barely notices the bird. Which type of relationship is this? A) Mutualism. B) Commensalism. C) Parasitism. D) None of the above. Show Answer Correct Answer: B) Commensalism. 38. Which organism can best be described as a saprotroph? A) A fungus that digests its food externally and absorbs the products of digestion. B) A beetle that feeds by ingesting the dung of other animal species and digesting its food internally. C) A single-celled eukaryote that is able to photosynthesize and consumes smaller organisms by endocytosis. D) A giraffe that feeds by ingesting leaves from an acacia tree. Show Answer Correct Answer: A) A fungus that digests its food externally and absorbs the products of digestion. 39. Which organisms can be found at the first, or lowest, trophic level? A) Producers. B) Composers. C) Consumers. D) Decomposers. Show Answer Correct Answer: A) Producers. 40. A ..... is a set of actions that are meant to help an ecosystem recover from damage. A) Restoration plan. B) Construction plan. C) Subdivision plan. D) Deconstruction plan. Show Answer Correct Answer: A) Restoration plan. 41. Which of the following are factors that could cause extinction? A) Destruction of animals' habitat. B) Climate change. C) Pollution. D) Increased human population (more people). E) ALL of the above could cause extinction. Show Answer Correct Answer: E) ALL of the above could cause extinction. 42. Which type of mining leaves a large footprint on the land? A) Room and pillar mining. B) Open pit mining. C) Drilling. D) Underground mining. Show Answer Correct Answer: B) Open pit mining. 43. By which process to plants convert radiant energy from the Sun into chemical energy? A) Bioaccumulation. B) Cellular respiration. C) Photosynthesis. D) Biomagnification. Show Answer Correct Answer: C) Photosynthesis. 44. By what process is the carbon in fossil fuels released into the atmosphere? A) Decomposition. B) Erosion. C) Respiration. D) Combustion. Show Answer Correct Answer: D) Combustion. 45. What do the arrows on the food chain or food web represent? A) The flow of energy. B) What eats what. C) The predators in the ecosystem. D) None of the above. Show Answer Correct Answer: A) The flow of energy. 46. Complete burning of plant material returns carbon primarily to the ..... A) Vegetation. B) Herbivores. C) Atmosphere. D) Water. Show Answer Correct Answer: C) Atmosphere. 47. Which level does energy flow directly to after the producer level? A) Producer. B) Decomposer. C) Primary consumer. D) Secondary consumer. Show Answer Correct Answer: C) Primary consumer. 48. A community that is specific, uniform and stable is called a A) Balanced community. B) New commuinty. C) Climax community. D) Adapt community. Show Answer Correct Answer: C) Climax community. 49. Which organism is a producer? A) Pine tree. B) Earthworm. C) Mushroom. D) Hawk. Show Answer Correct Answer: A) Pine tree. 50. Why is it important to conserve and protect endangered species? A) To increase the population of non-endangered species. B) Because endangered species are not important. C) To maintain biodiversity, ecological balance, and prevent the loss of valuable genetic resources. D) To allow for the natural extinction of species. Show Answer Correct Answer: C) To maintain biodiversity, ecological balance, and prevent the loss of valuable genetic resources. 51. All of the living parts of an ecosystem are ..... A) Biotic. B) Biography. C) Abiotic. D) Biology. Show Answer Correct Answer: A) Biotic. 52. Place the levels of environment in the correct order. A) Biome, biosphere, population, organism, ecosystem, community. B) Population, community, organism, biome, ecosystem, biosphere. C) Organism, population, community, ecosystem, biome, biosphere. D) Organism, ecosystem, biosphere, population, community, biome. Show Answer Correct Answer: C) Organism, population, community, ecosystem, biome, biosphere. 53. What is the significance of island geography in conservation biology? A) Island geography has no significance in conservation biology. B) Island geography only affects marine species, not terrestrial species. C) Island geography leads to the extinction of all species. D) Island geography provides unique ecosystems and habitats that are isolated from mainland influences, leading to the evolution of distinct species and vulnerability to extinction. Show Answer Correct Answer: D) Island geography provides unique ecosystems and habitats that are isolated from mainland influences, leading to the evolution of distinct species and vulnerability to extinction. 54. A strip mining company wants to lease some land that is currently part of a national park. They promise to reclaim the land should any minerals be mined from the area, and they are willing to pay top dollar for the rights. As an ecologist, what factors would you raise with the local government? A) The threat to local biodiversity. B) Management of the land after the company leaves. C) The new jobs that would be created. D) The increased traffic in the area. Show Answer Correct Answer: A) The threat to local biodiversity. 55. The sum total of a population's use of the biotic and abiotic resources of its habitat constitutes its A) Niche. B) Range. C) Environment. D) Evolution. Show Answer Correct Answer: A) Niche. 56. The benefits provided by ecosystems to humans are called A) Ecosystem adaptations. B) Ecosystem services. C) Ecosystem benefits. D) None of the above. Show Answer Correct Answer: B) Ecosystem services. 57. Decomposers affect all levels of the food web. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 58. Which type of organism "recycles" nutrients back into an ecosystem? A) Omnivores. B) Producers. C) Decomposers. D) Consumers. Show Answer Correct Answer: C) Decomposers. 59. Which of these phrases describes the biotic factors of an ecosystem? A) Any non-living part of an environment. B) An organism that eats only meat. C) Any living part of an environment. D) The number of individual organisms in each trophic level of an ecosystem. Show Answer Correct Answer: C) Any living part of an environment. 60. What is succession? A) A weather pattern. B) Change in a community. C) A type of animal. D) A type of plant. Show Answer Correct Answer: B) Change in a community. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Biology Chapter 14 Ecosystem Quiz 1Class 12 Biology Chapter 14 Ecosystem Quiz 3Class 12 Biology Chapter 14 Ecosystem Quiz 4Class 12 Biology Chapter 14 Ecosystem Quiz 5Class 12 Biology Chapter 14 Ecosystem Quiz 6Class 12 Biology Chapter 14 Ecosystem Quiz 7Class 12 Biology Chapter 14 Ecosystem Quiz 8Class 12 Biology Chapter 14 Ecosystem Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books