This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Detritivores have mouth parts. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. When a bird species feeds on insects, and in doing so, it helps control the insect population, this is an example of: A) Predation. B) Mutualism. C) Commensalism. D) Herbivory. Show Answer Correct Answer: A) Predation. 3. Which organisms are omnivores? Select all that apply. A) Organisms feeding only on plants. B) Organisms feeding only on meat. C) Organisms feeding on animals and plants. D) Organisms hunting, killing, and eating other animals. Show Answer Correct Answer: C) Organisms feeding on animals and plants. 4. Animals grow by eating food molecules and turning them into body molecules, so their bodies have more ..... A) Matter. B) Waste. C) Energy. D) Molecules. Show Answer Correct Answer: C) Energy. 5. Why might an invasive species be so successful in a certain nonnative habitats A) They have no natural predators. B) They are able to out-compete native species. C) They are generalist that eat many different types of food. D) All of the above. Show Answer Correct Answer: D) All of the above. 6. The original sources of energy for all living things come from A) Decomposers, which provide energy for consumers. B) The sun, which provides energy for producers. C) Producers, which provide energy for consumers. D) Consumers, which provide energy for consumers. Show Answer Correct Answer: B) The sun, which provides energy for producers. 7. What is the classification of an organism that is able to make organic compounds from inorganic nutrients? A) Saprotroph. B) Consumer. C) Detritivore. D) Autotroph. Show Answer Correct Answer: D) Autotroph. 8. A worm is an example of a ..... A) Consumer. B) Decomposer. C) Producer. D) None of the above. Show Answer Correct Answer: B) Decomposer. 9. Consists of all the living and non-living things with which an organism may interact. A) Habitat. B) Ecology. C) Community. D) Environment. Show Answer Correct Answer: D) Environment. 10. A species that is non-native or alien to an ecosystem A) Ecosystem services. B) Ecosystem disruption. C) Invasive species. D) None of the above. Show Answer Correct Answer: C) Invasive species. 11. Occurs in an area that was only partially destroyed bydisturbances A) Primary succession. B) Secondary succession. C) Niche. D) None of the above. Show Answer Correct Answer: B) Secondary succession. 12. What is the primary learning intention of studying ecosystem changes? A) To study human physiology. B) To memorize all extinct species. C) To investigate reasons for changing past ecosystems. D) To create new ecosystems. Show Answer Correct Answer: C) To investigate reasons for changing past ecosystems. 13. Organism that breaks down decaying organisms for food. A) Ecosystem. B) Heat. C) Decomposer. D) Eukaryotic. Show Answer Correct Answer: C) Decomposer. 14. Termites are able to digest wood because of microbes that live in their gut. The relationship between a termite and the microbes inside it is an example of what type of symbiosis? A) Predator-prey relationship. B) Parasitism. C) Mutualism. D) Commensalism. Show Answer Correct Answer: C) Mutualism. 15. Which statement BEST describes how matter moves within and between ecosystems? A) Matter flows in a one-way direction through food chains and food webs. B) Matter cycles between trophic levels in food chains and food webs. C) Matter is made and destroyed as it is used by living things. D) Matter cycles through food webs and biogeochemical cycles. Show Answer Correct Answer: D) Matter cycles through food webs and biogeochemical cycles. 16. The number of species in a community is called the A) Species richness. B) Species index. C) Species population. D) Species diversity. Show Answer Correct Answer: A) Species richness. 17. An uncut lawn eventually becomes a meadow and then a forest. This process is an example of ..... A) Secondary succession. B) Estuary. C) Primary succession. D) Aphotic zones. Show Answer Correct Answer: A) Secondary succession. 18. Which of the following characteristics do all plants share? A) They are all prokaryotes. B) They are all single-celled. C) They all produce flowers. D) They are all autotrophs. Show Answer Correct Answer: D) They are all autotrophs. 19. The energy stored in plant biomass is transferred through ..... A) Food chains. B) Carbon cycle. C) Nitrogen cycle. D) Water cycle. Show Answer Correct Answer: A) Food chains. 20. In a large Maine forest with many animals and lots of space, there are only a small number of bears. Which of these most likely limits the population of bears in the forest? A) Supply of food. B) Types of trees in the area. C) Space. D) Cloud cover in the atmosphere. Show Answer Correct Answer: A) Supply of food. 21. Scientists around the world use a standardized taxonomic system. Why would scientists want to use a taxonomic system that is standardized? A) In order to place organisms in different groups. B) Because Linnaeus established the system. C) So that Latin names can be applied for a practical purpose. D) In order to avoid confusion with the identification of organisms. Show Answer Correct Answer: D) In order to avoid confusion with the identification of organisms. 22. Which plant tissue is responsible for transporting water from roots to leaves? A) Cambium. B) Epidermis. C) Xylem. D) Phloem. Show Answer Correct Answer: C) Xylem. 23. A bird in a tree watched as a lion stalked, attacked, and then ate a zebra. Which of these animals was the prey? A) Bird. B) Lion. C) Zebra. D) All of the above. Show Answer Correct Answer: C) Zebra. 24. Photosynthesis is the most important chemical process on earth. It takes place in the ..... A) Chlorophyll. B) Chloroplast. C) Roots. D) None of the above. Show Answer Correct Answer: B) Chloroplast. 25. Which organism must eat other living things for energy? A) Producer. B) Plants. C) Consumer. D) Decomposer. Show Answer Correct Answer: C) Consumer. 26. Plants use CO2 in the process of ..... to make ..... and oxygen. A) Cellular respiration, glucose (sugar). B) Photosynthesis, water. C) Cellular respiration, water. D) Photosynthesis, glucose (sugar). Show Answer Correct Answer: D) Photosynthesis, glucose (sugar). 27. List three examples of living things in an ecosystem. A) Plants, animals, microorganisms. B) Cars, buildings, computers. C) Rocks, water, air. D) Books, pencils, paper. Show Answer Correct Answer: A) Plants, animals, microorganisms. 28. Name three human-made disruptions to ecosystems. A) Wildlife conservation, Deforestations. B) Natural Disasters. C) Reforestation, Buildng Dams. D) Deforestation, pollution, urbanization. Show Answer Correct Answer: D) Deforestation, pollution, urbanization. 29. People who study the different types of ecosystems are called A) Economies. B) Environmentalist. C) Economics. D) Ecologist. Show Answer Correct Answer: D) Ecologist. 30. The living part of an ecosystem A) Biotic. B) Abiotic. C) Flowers. D) Mother Earth. Show Answer Correct Answer: A) Biotic. 31. Energy used by most living things on Earth comes from the process of photosynthesis. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 32. An environmental factor such as storms and extreme heat or cold that affects population regardless of their density A) Density-independent factor. B) Population density. C) Dispersion. D) Density-dependent factor. Show Answer Correct Answer: A) Density-independent factor. 33. True or False:An ecosystem is a community of only LIVING things in their environment. A) False. B) True. C) X. D) X. Show Answer Correct Answer: A) False. 34. The forests that grow near the back waters of sea are A) Teak forests. B) Evergreen forests. C) Deciduous forests. D) Mangrove forests. Show Answer Correct Answer: D) Mangrove forests. 35. Which type of mining has the smallest environmental footprint? A) Drilling. B) Underground mining. C) Open pit mining. D) Room and pillar mining. Show Answer Correct Answer: A) Drilling. 36. The word ecosystem was coined by A) Hackel. B) A.G.Tansley. C) Robert Hook. D) Aristotle. Show Answer Correct Answer: B) A.G.Tansley. 37. What is the name for all the animals of the same species living in an ecosystem?? A) Community. B) Population. C) Biosphere. D) All of these. Show Answer Correct Answer: B) Population. 38. Food chains show energy transfer between organisms. The size of a food chain can vary, yet there is a limit to the number of levels that a food chain can reach. Why is there a limit to the number of levels that a food chain can reach? A) Energy is lost when you move up a trophic level. B) Carnivores are too big to be eaten. C) Plants are not infinitely in the world. D) Producers can only eat what is available. Show Answer Correct Answer: A) Energy is lost when you move up a trophic level. 39. What is one ethical issue associated with biotechnology? A) It has no ethical issues. B) The potential for genetic discrimination. C) It only affects plant growth. D) It is universally accepted without controversy. Show Answer Correct Answer: B) The potential for genetic discrimination. 40. What are epicormic buds? A) Flower buds that bloom in winter. B) Buds under the bark that grow after fire. C) Root structures for water absorption. D) Seed pods that open underwater. Show Answer Correct Answer: B) Buds under the bark that grow after fire. 41. Name This Relationship:Plants in a dense rainforest A) Predation. B) Parasitism. C) Competition. D) Commensalism. Show Answer Correct Answer: C) Competition. 42. What is the main difference between a food chain and a food web? A) Chains show one single path; webs show many interconnected paths. B) Only chains include producers. C) Only webs show predators. D) Chains show many feeding paths; webs show only one. Show Answer Correct Answer: A) Chains show one single path; webs show many interconnected paths. 43. How can biotechnology impact the environment positively? A) By increasing pollution. B) By reducing biodiversity. C) By developing crops that require fewer resources. D) By eliminating natural habitats. Show Answer Correct Answer: C) By developing crops that require fewer resources. 44. What is logistic growth? A) A model of growth that is linear. B) A model of growth that is exponential. C) A model of growth that is unrealistic. D) A more realistic model of growth. Show Answer Correct Answer: D) A more realistic model of growth. 45. The parasite tapeworm lives in the ..... A) Blood. B) Intestine. C) Stomach. D) Brain. Show Answer Correct Answer: B) Intestine. 46. What is the area of a quadrat that as sides of 0.5m in length? A) 1m$^{2}$. B) 0.5m$^{2}$. C) 0.25m$^{2}$. D) 2m$^{2}$. Show Answer Correct Answer: C) 0.25m$^{2}$. 47. Step in the passage of energy and matter through an ecosystem A) Niche. B) Habitat. C) Trophic level. D) Food chain. Show Answer Correct Answer: C) Trophic level. 48. True or False:Resilient ecosystems have some ability to adapt to changes over time A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 49. Define carrying capacity. A) The minimum resources required for a species to survive. B) The maximum population size that an environment can sustain indefinitely. C) The total number of species in an ecosystem. D) The average lifespan of a species in a habitat. Show Answer Correct Answer: B) The maximum population size that an environment can sustain indefinitely. 50. Anything living such as an animal, plant, insect, bacteria, etc. A) Rainforests. B) Terrarium. C) Non Living Things. D) Living Things. Show Answer Correct Answer: D) Living Things. 51. What adaptation do kangaroos have for efficient movement? A) Slithering movement like snakes. B) Unique hopping locomotion. C) Webbed feet for swimming. D) Wings for short flights. Show Answer Correct Answer: B) Unique hopping locomotion. 52. What will most likely occur if the population of the world continues to increase at predicted rates? A) There will be an increase in biodiversity as a result of improvements in technology. B) Many organisms will lose their homes because their habitats have been destroyed. C) The human race will rapidly become extinct. D) All human diseases will be eliminated. Show Answer Correct Answer: B) Many organisms will lose their homes because their habitats have been destroyed. 53. Abiotic factors include ..... A) Living things like animals, fungi, and plants. B) Landfills. C) Nonliving things like soil, rocks, and water. D) Both living and nonliving things. Show Answer Correct Answer: C) Nonliving things like soil, rocks, and water. 54. These organisms must eat to obtain their energy A) Producers. B) Autotrophs. C) Niche. D) Heterotrophs. Show Answer Correct Answer: D) Heterotrophs. 55. Exponential growth appears as: A) Flat line. B) Straight line. C) S-shaped curve. D) J-shaped curve. Show Answer Correct Answer: D) J-shaped curve. 56. What is a common method of seed dispersal among Australian flora? A) Sunlight reflection. B) Water jet propulsion. C) Wind dispersal. D) Electrical discharge. Show Answer Correct Answer: C) Wind dispersal. 57. What cell part captures the sun's energy and allow plants to make their own food? A) Nucleus. B) Cell membrane. C) Chloroplasts. D) Cytoplasm. Show Answer Correct Answer: C) Chloroplasts. 58. Mushrooms, mould and yeast belong to ..... A) Protista kingdom. B) Mammals. C) Monera kingdom. D) Fungi kingdom. Show Answer Correct Answer: D) Fungi kingdom. 59. In nature, which type of behavior causes animals to produce aggressive displays and sounds? A) Territoriality. B) Conditioning. C) Imprinting. D) Habituation. Show Answer Correct Answer: A) Territoriality. 60. ..... is a proposed answer to a question. A) Arguement. B) Claim. C) Hypothesis. D) Evidence. Show Answer Correct Answer: B) Claim. ← 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