This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 12 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The levels of the ecosystem are: A) Biosphere, individual organism, community, ecosystem, population. B) Individual organism, population, community, ecosystem, biosphere. C) Individual organism, community, ecosystem, population, biosphere. D) Ecosystem, community, biosphere, individual organism, population. Show Answer Correct Answer: B) Individual organism, population, community, ecosystem, biosphere. 2. Secondary consumers get energy from A) Eating consumers who eat producers. B) Eating producers. C) Consuming dead or decaying matter. D) Converting light energy from the sun to chemical energy. Show Answer Correct Answer: A) Eating consumers who eat producers. 3. Which factor can affect enzyme activity by altering its shape? A) Magnetic fields. B) Sound waves. C) Light intensity. D) PH level. Show Answer Correct Answer: D) PH level. 4. What role do dominant primary producers play in an ecosystem? A) They convert inorganic to organic matter. B) They are the largest species. C) They regulate the climate. D) They consume the most resources. Show Answer Correct Answer: A) They convert inorganic to organic matter. 5. What defines a community in ecology? A) A group of interacting populations of different species. B) Interactions between abiotic factors only. C) A collection of similar ecosystems. D) A single species population in an area. Show Answer Correct Answer: A) A group of interacting populations of different species. 6. A scientist who studies the interaction between organisms and their environments A) Ecologist. B) Zoologist. C) Biologist. D) Geologist. Show Answer Correct Answer: A) Ecologist. 7. Non-living is called: A) Temperature. B) Rain. C) Abiotic. D) Biotic. Show Answer Correct Answer: C) Abiotic. 8. List three examples of non-living things in an ecosystem. A) Sun, moon, stars. B) Birds, fish, insects. C) Tree, grass, flowers. D) Rock, water, air. Show Answer Correct Answer: D) Rock, water, air. 9. Group of individuals of a species that live in the same area is called A) Population. B) Biome. C) Species. D) Ecosystem. Show Answer Correct Answer: A) Population. 10. A certain plant needs moisture, carbon dioxide, oxygen light, and minerals to survive. This scenario shows that a living organism depends on A) Carnivore-herbivore relationships. B) Biotic factors. C) Abiotic factors. D) Symbiotic relationships. Show Answer Correct Answer: C) Abiotic factors. 11. Which of the following describes a benefit of biodiversity to an ecosystem? A) Decreases the energy flow through the ecosystem. B) Increases the maximum number of trophic levels. C) Increases the maximum biomass of the ecosystem. D) Allows the ecosystem to withstand environmental changes. Show Answer Correct Answer: D) Allows the ecosystem to withstand environmental changes. 12. The two species, Paramecium aurelia and Paramecium caudatum, which do not prey upon each other, fighting to grow in the same test tube is an example of which of the following? A) Predation. B) Immigration. C) Competition. D) Emigration. Show Answer Correct Answer: C) Competition. 13. Jaring-jaring makanan adalah ..... A) Jaring-jaring yang berbentuk seperti makanan. B) Makan makanan yang berbentuk seperti jaring. C) Kumpulan dari beberapa rantai makanan yang saling berhubungan. D) Peristiwa makan dan dimakan dengan urutan dan arah tertentu. Show Answer Correct Answer: C) Kumpulan dari beberapa rantai makanan yang saling berhubungan. 14. Carbon is used to make ..... during photosynthesis. A) Glucose (sugar). B) Sunlight. C) Dioxide. D) None of the above. Show Answer Correct Answer: A) Glucose (sugar). 15. Click Here to Access the ReadingGo to Reading 3According to READING 3, how much food is available in the area the African Buffalo go to in the wet season? A) 40-80 grams per square meter. B) 20-40 grams per square meter. C) 80-100 grams per square meter. D) 40-60 grams per square meter. Show Answer Correct Answer: C) 80-100 grams per square meter. 16. A group of bunnies living in the forest is an example of a ..... A) Individual. B) Population. C) Ecosystem. D) Community. Show Answer Correct Answer: B) Population. 17. What did Maria Sibylla Merian focus on instead of preserved specimens? A) Fossils. B) Living insects. C) Rocks. D) Marine life. Show Answer Correct Answer: B) Living insects. 18. A human & a Tape Worm:The tape worm gets a place to live in the intestines of the human and food from the human. The human loses weight and nutrients from the tape worm. A) Mutualism. B) Commensalism. C) Parasitism. D) None of the above. Show Answer Correct Answer: C) Parasitism. 19. A stable ecosystem is one where A) The population numbers of each organism change at a predictable rate. B) The supply of resources in the physical environment changes at a predictable rate. C) Energy flows through the ecosystem at a fairly constant rate over time. D) All of the above. Show Answer Correct Answer: D) All of the above. 20. After a volcanic eruption, volcanic rock is present (but no soil). Which of the following states the most likely order of succession that would be seen? A) Lichens $\rightarrow$ Grasses $\rightarrow$ Shrubs $\rightarrow$ Trees. B) Lichens $\rightarrow$ tree $\rightarrow$ shrubs$\rightarrow$Grasses. C) Lichens $\rightarrow$ Shrubs $\rightarrow$ Grasses $\rightarrow$ Trees. D) Grasses $\rightarrow$ Lichens $\rightarrow$ Shrubs $\rightarrow$ Trees. Show Answer Correct Answer: A) Lichens $\rightarrow$ Grasses $\rightarrow$ Shrubs $\rightarrow$ Trees. 21. Explain the difference between a food chain and a food web. A) A food chain is more complex than a food web. B) A food chain involves only producers, while a food web involves only consumers. C) A food chain is a web of interconnected organisms, while a food web is a linear sequence of organisms. D) A food chain is a linear sequence of organisms, while a food web is a more complex network of interconnected food chains. Show Answer Correct Answer: D) A food chain is a linear sequence of organisms, while a food web is a more complex network of interconnected food chains. 22. Does the energy get lower or higher when it is transferred through each animal? A) It gets higher. B) It gets lower. C) All the above. D) None of the above. Show Answer Correct Answer: B) It gets lower. 23. Food chain:algae>plankton>blue whaleWhich of the following is the primary producers? A) Algae. B) Plankton. C) Blue whale. D) None. Show Answer Correct Answer: A) Algae. 24. The plant kingdom is divided into two main groups: A) Flowering & non-flowering. B) Trees & plants. C) Conifers & flowering plants. D) Spores & seeds. Show Answer Correct Answer: D) Spores & seeds. 25. Some bacteria can capture energy from inorganic molecules such as hydrogen sulfide. These bacteria use a process called A) Chemosynthesis. B) Photosynthesis. C) Carbon cycle. D) None of the above. Show Answer Correct Answer: A) Chemosynthesis. 26. How do invasive species impact ecosystems? A) The increase density dependent limiting factors. B) They establish themselves as new keystone species in an area. C) The open up new niches in the ecosystem. D) They outcompete native species and overpopulate the area. Show Answer Correct Answer: D) They outcompete native species and overpopulate the area. 27. Which of the following is an example of a heterotrophic organism? A) Mosses. B) Ferns. C) Humans. D) Algae. Show Answer Correct Answer: C) Humans. 28. Explain the concept of a food chain. A) A food chain is a method of organizing grocery items in a store. B) A food chain is a series of organisms, each dependent on the next as a source of food. C) A food chain is a type of necklace made from food items. D) A food chain is a series of restaurants serving different types of cuisine. Show Answer Correct Answer: B) A food chain is a series of organisms, each dependent on the next as a source of food. 29. Which of the following is not part of the classification community? A) Tree. B) Sun. C) Bear. D) Fox. Show Answer Correct Answer: B) Sun. 30. What are secondary consumers in a food chain? A) Plants. B) Seeds. C) Worms. D) Birds. Show Answer Correct Answer: D) Birds. 31. Which of the following ecosystems is TERRESTRIAL? A) Wetlands. B) Oceans. C) Lakes and Ponds. D) None of the above. Show Answer Correct Answer: A) Wetlands. 32. What is the role of a producer in an ecosystem? A) Producers convert sunlight into energy through photosynthesis and form the base of the food chain. B) Producers convert air into energy through photosynthesis. C) Producers convert soil into energy through photosynthesis. D) Producers convert water into energy through photosynthesis. Show Answer Correct Answer: A) Producers convert sunlight into energy through photosynthesis and form the base of the food chain. 33. In a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks, the grasshoppers are A) Primary consumers. B) Secondary producers. C) Secondary consumers. D) Primary producers. Show Answer Correct Answer: A) Primary consumers. 34. Approximately how much energy is lost when moving up each trophic level? A) 50%. B) 90%. C) 70%. D) 10%. Show Answer Correct Answer: B) 90%. 35. Organisms that break down waste and dead organisms. A) Producer. B) Decomposer. C) Detritus. D) Consumer. Show Answer Correct Answer: B) Decomposer. 36. Which type(s) of cells have genetic material that is contained in a nucleus? A) Bacteria. B) Only animal cells. C) Protists. D) Both plant and animal cells. Show Answer Correct Answer: D) Both plant and animal cells. 37. What do animals in a food chain consume? A) Nutrients from the soil and water. B) Only other animals. C) Plants and other animals. D) Only plants. Show Answer Correct Answer: C) Plants and other animals. 38. Which biome is the Amazon part of? A) Desert. B) Taiga. C) Rainforest. D) Tundra. Show Answer Correct Answer: C) Rainforest. 39. Students wanted to investigate the distribution patterns of periwinkles and brown algae at various distances from the high tide mark on a rock platform. The best sampling technique would be: A) Point Sampling. B) Transect. C) Quadrats and Transect. D) Capture-Recapture. Show Answer Correct Answer: C) Quadrats and Transect. 40. ..... :a collection of all the organisms living in a particular place together with their abiotic components, such as water and air. A) Community. B) Biosphere. C) Biome. D) Ecosystem. Show Answer Correct Answer: D) Ecosystem. 41. A population is a group of organisms of the same species which live in different habitats A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 42. What does the term "aquatic" mean? A) Water-based ecosystem. B) Land-based ecosystem. C) All the above. D) None of the above. Show Answer Correct Answer: A) Water-based ecosystem. 43. Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the most likely outcome for the ecosystem? A) Biodiversity would decrease, and sustainability would decrease. B) Biodiversity would decrease, and sustainability would increase. C) Biodiversity would increase, and sustainability would increase. D) Biodiversity would increase, and sustainability would decrease. Show Answer Correct Answer: A) Biodiversity would decrease, and sustainability would decrease. 44. Carbon dioxide and water enter the environment when A) Fossil fuels are burned through combustion. B) Plants undergo photosynthesis. C) Rivers absorb gases. D) None of the above. Show Answer Correct Answer: A) Fossil fuels are burned through combustion. 45. T/F:Biodiversity is a good thing because it provides variety in an ecosystem. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 46. Primary Consumers are usually carnivores. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 47. Gases such as nitrogen, oxygen and carbon dioxide make up which of Earth's spheres? A) Lithosphere. B) Atmosphere. C) Hydrosphere. D) Biosphere. Show Answer Correct Answer: B) Atmosphere. 48. In Hawaii, there are volcanoes. Before anything was there, the volcanoes erupted which produced volcanic rock. Lichens were the first species to arrive, and they broke down the rock into soil. Eventually, plants began to grow. Now, the islands are functioning at their climax community.What is the pioneer species in this example? A) Rock. B) Lichens. C) Shrubs. D) Trees. Show Answer Correct Answer: B) Lichens. 49. What unique reproductive strategy do kangaroos have? A) Giving birth to fully developed joeys. B) Having multiple litters of joeys at the same time. C) Ability to pause the development of an embryo. D) Laying eggs like monotremes. Show Answer Correct Answer: C) Ability to pause the development of an embryo. 50. Which is an abiotic factor that influences the population of the rats? A) The amount of food available. B) The amount of competition in the ecosystem. C) The number of predators available. D) The amount of water available. Show Answer Correct Answer: D) The amount of water available. 51. Which statement describes an autotroph? A) It is an organism that makes its own food. B) It is an organism that eats other organisms. C) It is an organism that eats decaying matter. D) None of the above. Show Answer Correct Answer: A) It is an organism that makes its own food. 52. From an ecology perspective, a population is: A) The series of species in an ecosystem. B) The series of organisms of the same species in an ecosystem. C) The series of organisms in an ecosystem. D) The number of individuals in an ecosystem. Show Answer Correct Answer: B) The series of organisms of the same species in an ecosystem. 53. A tree is an example of a ..... A) Consumer. B) Decomposer. C) Producer. D) None of the above. Show Answer Correct Answer: C) Producer. 54. A species is a group of similar organisms, able to interbreed and produce offsprings A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 55. Extreme algal growth in aquatic environments due to nitrogen/phosphorous pollution. A) Longitude. B) Eutrophication. C) Habitat Fragmentation. D) Biome. Show Answer Correct Answer: B) Eutrophication. 56. Which part of the ocean receives the LEAST amount of sunlight? A) Top. B) Middle. C) Bottome. D) None of the above. Show Answer Correct Answer: C) Bottome. 57. What activity most contributes to the depletion of the ozone layer? A) Release of CFCs. B) Overuse of fertilizers. C) Deforestation. D) Burning fossil fuels. Show Answer Correct Answer: A) Release of CFCs. 58. Which biome, because of its climate and amount of rainfall, has the largest number of species of plants and animals? A) Pineforest. B) Tundra. C) Rainforest. D) Desert. Show Answer Correct Answer: C) Rainforest. 59. (9)Which land biome has hot summers and cold winters with a high-average amount of precipitation and trees that lose their leaves? A) Temperate deciduous forest. B) Tropical rainforest. C) Coniferous forest. D) Temperate grassland. Show Answer Correct Answer: A) Temperate deciduous forest. 60. What is the significance of the nitrogen cycle in an ecosystem? A) It is only important for aquatic ecosystems. B) It only affects the nitrogen levels in the atmosphere. C) It has no impact on the ecosystem. D) It is essential for the growth of plants and the production of proteins. Show Answer Correct Answer: D) It is essential for the growth of plants and the production of proteins. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Biology Chapter 14 Ecosystem Quiz 1Class 12 Biology Chapter 14 Ecosystem Quiz 2Class 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books