This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Select the plant or animal that can be found in the desert ecosystem. A) Cacti. B) Cat. C) Toucan. D) Bear. Show Answer Correct Answer: A) Cacti. 2. A scientist was studying a population of fish in a pond over a period of 10 years. They observed thatthe population increased each year for 3 years, and then remained nearly constant for the rest ofthe study. The best explanation for this observation is that the population had A) Stopped reproducing. B) Reached carrying capacity. C) Mutated into a different species. D) Run out of food and all died. Show Answer Correct Answer: B) Reached carrying capacity. 3. The arrow in a food chain shows ..... A) What eats what. B) The link from predator to prey. C) The energy transferred. D) The number of steps in the chain. Show Answer Correct Answer: C) The energy transferred. 4. Berikut ini yang tergolong organisme autotrof adalah ..... A) Jamur saprofit. B) Serangga. C) Tali putri. D) Lumut. Show Answer Correct Answer: D) Lumut. 5. Berikut ini yang bukan merupakan komponen abiotik adalah ..... A) Air. B) Udara. C) Tanah. D) Tumbuhan. Show Answer Correct Answer: D) Tumbuhan. 6. The process by which the body breaks down food so that it can be used in the process of cellular respiration ..... A) Deposition. B) Absorption. C) Digestion. D) Composition. Show Answer Correct Answer: C) Digestion. 7. What would happen is rabbits from a warm, southern climate were moved to a cold, northern climate? A) ALL of the rabbits will try to adapt to the change. B) MOST of the rabbits will try to adapt to the change. C) FEW OR NONE will adapt to the change. D) None of the above. Show Answer Correct Answer: C) FEW OR NONE will adapt to the change. 8. An organism that eats primary consumers. A) Primary Consumer. B) Biological Magnification. C) Energy Pyramid. D) Secondary Consumer. Show Answer Correct Answer: D) Secondary Consumer. 9. The variety of environmental conditions which an organism survives and reproduces is called A) Tolerance. B) Microbiome. C) Optimum range. D) Adaptation. Show Answer Correct Answer: A) Tolerance. 10. What recent changes in climate have affected Australia? A) An increase in rainforest areas. B) A general cooling of the continent. C) A decrease in desert areas. D) A drying out and general warming. Show Answer Correct Answer: D) A drying out and general warming. 11. What is the 'great drying'? A) An increase in ocean levels around Australia. B) A significant effect on Australia's biota due to drying. C) A cooling phase in Australia's climate. D) A period of significant rainfall. Show Answer Correct Answer: B) A significant effect on Australia's biota due to drying. 12. Which of the following would NOT be an effect of factory runoff in a local stream? A) Increase in Biodiversity. B) Extirpation of Sensitive Species. C) Increase in Algal Growth. D) Change in Water pH. Show Answer Correct Answer: A) Increase in Biodiversity. 13. Autotrophs use ..... to produce ..... A) O$_{2}$$_{}$, glucose. B) CO$_{2}$, deoxyribose. C) CO$_{2}$, glucose. D) O$_{2}$, deoxyribose. Show Answer Correct Answer: C) CO$_{2}$, glucose. 14. In the ..... zone, the sea floor drops sharply. A) Oceanic. B) Neritic. C) Intertidal. D) Benthic. Show Answer Correct Answer: A) Oceanic. 15. Which gas in the atmosphere causes acid rain?Tick ONE box. A) Carbon monoxide. B) Sulfur dioxide. C) Ozone. D) Oxygen. Show Answer Correct Answer: B) Sulfur dioxide. 16. A secondary succession is formed: A) On an existing succession that has suffered disruptions from natural causes. B) On a secondary succession that has suffered disruptions from natural causes. C) On a primary succession that has not suffered disruptions from natural causes. D) On an existing succession that has not suffered disruptions from natural causes. Show Answer Correct Answer: A) On an existing succession that has suffered disruptions from natural causes. 17. Prey, other species, and plants are ..... factors. A) Abiotic. B) Biotic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Biotic. 18. How do humans affect ecosystems? A) By reducing the use of chemicals. B) By habitat loss, overuse of resources, introduction of species to a new area, overuse of chemicals such as fertilizer. C) By creating more natural habitats. D) By increasing biodiversity. Show Answer Correct Answer: B) By habitat loss, overuse of resources, introduction of species to a new area, overuse of chemicals such as fertilizer. 19. What is a feature of shorter wavelength radiation? A) It is absorbed by greenhouse gases. B) It is reflected by chlorophyll. C) It has less energy per photon than longer wavelengths. D) It is the type emitted by the Sun. Show Answer Correct Answer: D) It is the type emitted by the Sun. 20. What is the function of rybosomes? A) Store and regulate DNA. B) Organizing microtubules that serve as the cell's skeletal system. C) Store nutrients and water. D) Protein synthesis. Show Answer Correct Answer: D) Protein synthesis. 21. ..... :Nonliving things in an ecosystem (air, soil, water, sunlight) A) Abiotic Factors. B) Biotic Factors. C) All the above. D) None of the above. Show Answer Correct Answer: A) Abiotic Factors. 22. True or False:Humans have no impact on the environment and do not impact succession. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. All are considered to be abiotic factors EXCEPT A) Air currents. B) Temperature. C) Moisture. D) Predators. Show Answer Correct Answer: D) Predators. 24. What is a density-dependent factor? A) Affects all populations equally. B) Stronger as population gets larger. C) Caused only by weather. D) Affects only small populations. Show Answer Correct Answer: B) Stronger as population gets larger. 25. These interactions are called: A) Population growth. B) Trophic levels. C) Community interactions. D) Limiting factors. Show Answer Correct Answer: C) Community interactions. 26. Without plants we would have no animals. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 27. What makes two species that use similar resources not compete? A) Both of them migrate out of season. B) Options b) or c) come about. C) One of them migrates out of season. D) They have different ecological niches. Show Answer Correct Answer: D) They have different ecological niches. 28. An area characterized by specific plants and animals. A) Longitude. B) Biome. C) Eutrophication. D) Habitat Fragmentation. Show Answer Correct Answer: B) Biome. 29. Which of the following statements regarding food webs is true? A) Several species of primary consumers may feed on the same species of producer. B) A consumer eats only one type of producer. C) Detritivores consume dead organic matter from a specific trophic level. D) Nutrient transfer moves from producer to consumer and back. Show Answer Correct Answer: A) Several species of primary consumers may feed on the same species of producer. 30. Small consumers that are hunted and eaten by larger consumers A) Producer. B) Prey. C) Predator. D) None of the above. Show Answer Correct Answer: B) Prey. 31. Which principle states that no two species can occupy exactly the same niche in the same habitat at the same time? A) Symbiotic inclusion principle. B) Symbiotic exclusion principle. C) Competitive exclusion principle. D) Competitive inclusion principle. Show Answer Correct Answer: C) Competitive exclusion principle. 32. Which is an example of a consumer eating another consumer in an ocean ecosystem? A) A shark eating a tuna. B) A fish eating algae. C) A sea turtle eating sea grass. D) A sea worm eating dead animals. Show Answer Correct Answer: A) A shark eating a tuna. 33. Carbon dioxide for photosynthesis comes from A) The sun. B) The stem. C) The air. D) The soil. Show Answer Correct Answer: C) The air. 34. What term used for the range of external conditions within which a species can survive and reproduce? A) Tolerance. B) Resilience. C) Camouflage. D) Pioneer species. Show Answer Correct Answer: A) Tolerance. 35. What does an organism's niche describe? A) Population size. B) The organism's role, including habitat, food, and interactions. C) Number of predators. D) Genetic makeup. Show Answer Correct Answer: B) The organism's role, including habitat, food, and interactions. 36. Mountains, ocean floors and the rest of the Earth's solid landscape make up which of Earth's spheres? A) Lithosphere. B) Hydrosphere. C) Biosphere. D) Atmosphere. Show Answer Correct Answer: A) Lithosphere. 37. Which of the following BEST explains what will occur when a population grows larger than the carrying capacity of its environment? A) The competition rate will decrease. B) The death rate will increase. C) The birth rate will increase. D) The emigration rate will decrease. Show Answer Correct Answer: B) The death rate will increase. 38. Very rarely do ecosystems contain more than four trophic levels because there is not enough energy to support more. In which trophic level is there the least energyavailable? A) Secondary consumer. B) Producer. C) Primary consumer. D) Tertiary consumer. Show Answer Correct Answer: D) Tertiary consumer. 39. Second level of Organization A) Tissues. B) Cells. C) Organ System. D) Organs. E) Organism. Show Answer Correct Answer: A) Tissues. 40. Without detritivores and decomposers dead organisms would break down in other ways. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 41. What significant event is mentioned as a massive speciation event? A) The Cretaceous Period. B) The Industrial Revolution. C) The Cambrian explosion. D) The Permian Extinction. Show Answer Correct Answer: C) The Cambrian explosion. 42. A tarantula is a ..... A) Secondary consumer. B) Herbivore. C) Scavenger. D) Producer. Show Answer Correct Answer: A) Secondary consumer. 43. Where can you find nitrogen-fixing bacteria? A) Decaying plants and animals. B) Waterlogged soil. C) Root nodules. D) Stems of leguminous plants. Show Answer Correct Answer: C) Root nodules. 44. The ..... zone is the ocean floor. A) Neritic. B) Intertidal. C) Benthic. D) Oceanic. Show Answer Correct Answer: C) Benthic. 45. Explain the concept of genetic diversity in relation to biodiversity. A) Biodiversity is not influenced by genetic diversity. B) Genetic diversity only affects individual organisms, not entire populations. C) Genetic diversity has no impact on biodiversity. D) Genetic diversity is important for biodiversity as it allows species to adapt to changing environments and helps maintain healthy populations. Show Answer Correct Answer: D) Genetic diversity is important for biodiversity as it allows species to adapt to changing environments and helps maintain healthy populations. 46. What do you call of the position of an organism in each level of a food chain? A) Ecosystem dynamics. B) Trophic level. C) Food chain. D) Pyramid. Show Answer Correct Answer: B) Trophic level. 47. In one ecosystem, snakes eat birds, plants make fruit, and birds eat fruit. What is the correct food chain? A) Bird$\rightarrow$plant$\rightarrow$snake. B) Snake$\rightarrow$plant$\rightarrow$bird. C) Plant$\rightarrow$bird$\rightarrow$snake. D) Snake$\rightarrow$bird$\rightarrow$plant. Show Answer Correct Answer: C) Plant$\rightarrow$bird$\rightarrow$snake. 48. The carrying capacity of a population is A) The amount of pollution humans can put into the environment. B) The limit of the number of people in a city. C) The maximum number of individuals an ecosystem can support. D) How many birds a cow can carry on its back. Show Answer Correct Answer: C) The maximum number of individuals an ecosystem can support. 49. After plants make glucose (sugar), with photosynthesis, they undergo ..... A) Cellular respiration. B) Biotic factors. C) Heterotroph. D) None of the above. Show Answer Correct Answer: A) Cellular respiration. 50. How do scientists organize living things? A) By shared characteristics. B) By differences. C) By looks. D) By size. Show Answer Correct Answer: A) By shared characteristics. 51. A tree is a ..... A) Composer. B) Decomposer. C) Producer. D) None of the above. Show Answer Correct Answer: C) Producer. 52. An organism is an abiotic factor A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 53. Hubungan biotik adalah ..... A) Hubungan antara makhluk hidup dengan lingkungannya. B) Hubungan antara makhluk hidup dalam suatu ekosistem dengan makhluk hidup dalam ekosistem yang lain. C) Hubungan antarekosistem dalam biosfer. D) Hubungan antarmakhluk hidup dalam suatu ekosistem. Show Answer Correct Answer: D) Hubungan antarmakhluk hidup dalam suatu ekosistem. 54. What is the potential future focus after studying past ecosystems? A) Quantum physics. B) Space exploration. C) Historical human civilizations. D) Future ecosystems. Show Answer Correct Answer: D) Future ecosystems. 55. In the water cycle, how can the ground gets the water? A) Precipitation. B) Evaporation. C) Respiration. D) Transpiration. Show Answer Correct Answer: A) Precipitation. 56. Which is a biotic limiting factor that would influence the growth of a deer population? A) High temperatures. B) Amount of plant growth. C) A forest fire. D) Amount of monthly rainfal. Show Answer Correct Answer: B) Amount of plant growth. 57. What are climax species? A) Species that only live in deserts. B) Short-lived species that mark the beginning of succession. C) Stable, long-lived species that mark the end of succession. D) Species that are always changing. Show Answer Correct Answer: C) Stable, long-lived species that mark the end of succession. 58. As the grasshopper and rabbit populations in an area increase, the amount of plants in the area decreases. What else will most likely increase? A) The carrying capacity of both grasshoppers and rabbits. B) Competition between grasshoppers and rabbits. C) The resources needed by both grasshoppers and rabbits. D) The diversity of the plants growing in the area. Show Answer Correct Answer: B) Competition between grasshoppers and rabbits. 59. Microbes in the soil have an important job. What is it A) Decomposers. B) Giving nutrients to plants. C) Absorption. D) A and b. Show Answer Correct Answer: D) A and b. 60. The first species to populate an area after a disturbance is called: A) A pilgrim species. B) A primary species. C) A pioneer species. D) A founder species. Show Answer Correct Answer: C) A pioneer species. ← 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