This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 13 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the purpose of using the geological time scale? A) To study the history of human civilization. B) To understand the impact of events on biodiversity. C) To memorize all epochs and eras. D) To predict future geological events. Show Answer Correct Answer: B) To understand the impact of events on biodiversity. 2. Autotrophs can be classified into two groups according to which of these properties? A) Energy source, either sunlight or chemicals. B) Food quality, either living matter or dead matter. C) Food type, either plant matter or animal matter. D) Water quality, either fresh water or salt water. Show Answer Correct Answer: A) Energy source, either sunlight or chemicals. 3. Which of the following is in order from largest to smallest? A) Ecosystem-community-population-organism. B) Ecosystem-population-community-organism. C) Ecosystem-community-organism-population. D) None of the above. Show Answer Correct Answer: A) Ecosystem-community-population-organism. 4. Chemoautotrophs gain energy from the oxidisation of inorganic substances such as hydrogen sulphide & ammonia through chemosynthesis. An example of a chemoautotrophs is a ..... A) Green plant. B) Fungi. C) Bacteria. D) Human. Show Answer Correct Answer: C) Bacteria. 5. What happens to the numbers of predators if their prey numbers drop? A) They also drop. B) They go up. C) They stay the same. D) None of the above. Show Answer Correct Answer: A) They also drop. 6. Which type of mimicry involves a harmless species resembling a harmful one? A) Batesian mimicry. B) Aposematic mimicry. C) Cryptic mimicry. D) Mullerian mimicry. Show Answer Correct Answer: A) Batesian mimicry. 7. Why might a numbers pyramid be inverted in a forest? A) Energy increases at higher levels. B) Small numbers of large producers can support many insects and birds. C) Producers always outnumber consumers. D) Biomass is greater at the top. Show Answer Correct Answer: B) Small numbers of large producers can support many insects and birds. 8. Name This Relationship:Colobus Monkey and Fig Tree A) Commensalism. B) Predation. C) Parasitism. D) Mutualism. Show Answer Correct Answer: D) Mutualism. 9. Which would be a limiting factor on the rats A) The availability of food. B) The number of predators. C) The availability of abiotic resources. D) All are limiting factors. Show Answer Correct Answer: D) All are limiting factors. 10. What characterizes exponential growth? A) Slow and steady increase. B) Rapid growth (1, 2, 4, 8, 16, 32 ). C) Decline in population size. D) Fluctuating growth rates. Show Answer Correct Answer: B) Rapid growth (1, 2, 4, 8, 16, 32 ). 11. What is the name of an organism that makes its own food A) Predator. B) Consumer. C) Producer. D) Omnivore. Show Answer Correct Answer: C) Producer. 12. Berikut ini yang merupakan produsen pada ekosistem danau adalah ..... A) Zooplankton. B) Bakteri. C) Fitoplankton. D) Jamur. Show Answer Correct Answer: C) Fitoplankton. 13. Which is the correct, balanced equation for PHOTOSYNTHESIS? A) C6H12O6 + 6O2 + 6H2O + sunlight $\rightarrow$ 6CO2 + 12H2O. B) C6H12O6 + 6O2 + 6H2O $\rightarrow$ 6CO2 + 12H2O + ATP. C) 6CO2 + 12H2O + sunlight $\rightarrow$ C6H12O6 + 6O2 + 6H2O. D) C6H12O6 + 6O2 + 6H2O + ATP$\rightarrow$ 6CO2 + 12H2O. Show Answer Correct Answer: C) 6CO2 + 12H2O + sunlight $\rightarrow$ C6H12O6 + 6O2 + 6H2O. 14. Which of the following is not an advantage of using a mesocosm to explore the impact of an environmental factor rather than doing it in situ (in the original place)? A) The experiment can be repeated/multiple samples taken. B) The experiment can be controlled. C) The experiment is identical to the natural environment. D) The experiment is continuous. Show Answer Correct Answer: C) The experiment is identical to the natural environment. 15. Animals that eat a variety of meats, fruits, and vegetables are A) Omnivores. B) Producers. C) Carnivores. D) Herbivores. Show Answer Correct Answer: A) Omnivores. 16. An organism that gets its energy by eating producers. A) Biological Magnification. B) Primary Consumer. C) Energy Pyramid. D) Secondary Consumer. Show Answer Correct Answer: B) Primary Consumer. 17. What is the hierarchy of organisms in a food chain? A) Plants, primary consumers, secondary consumers, top predators. B) Secondary consumers, primary consumers, plants, top predators. C) Top predators, secondary consumers, primary consumers, plants. D) Plants, secondary consumers, primary consumers, top predators. Show Answer Correct Answer: A) Plants, primary consumers, secondary consumers, top predators. 18. Which of the following is NOT an example of density-dependent limiting factors? A) Food Scarcity. B) Wildfires. C) Predation. D) Disease. Show Answer Correct Answer: B) Wildfires. 19. A herbivore is ..... A) An animal that feeds only on plants. B) An organism that produces its own food. C) An animal that feeds only on meat. D) An animal that feeds on plants and animals. Show Answer Correct Answer: A) An animal that feeds only on plants. 20. Which of the following is a characteristic of island geography? A) Isolation by deserts. B) Isolation by water. C) Isolation by forests. D) Isolation by mountains. Show Answer Correct Answer: B) Isolation by water. 21. Weather (such as rain) and soil conditions are considered to be part of the ..... factors of an ecosystem. A) Biomass. B) Biotic. C) Antibiotic. D) Abiotic. Show Answer Correct Answer: D) Abiotic. 22. Where do all life forms get their energy? A) Water. B) Plants. C) The Sun. D) Earth's Core. Show Answer Correct Answer: C) The Sun. 23. An organism that obtains energy by feeding on other organism is a ..... A) Producer. B) Consumer. C) Decomposer. D) None of the above. Show Answer Correct Answer: B) Consumer. 24. What is the primary reason for habitat destruction leading to species extinction? A) Human population growth. B) Pollution. C) Global warming. D) Invasive species. Show Answer Correct Answer: A) Human population growth. 25. Radiometric dating is a technique used to calculate: A) The age of fossils. B) The age of rocks and minerals. C) The type of species. D) The closest related ancestor of a species. Show Answer Correct Answer: B) The age of rocks and minerals. 26. Why do smaller population sizes in fragmented habitats lead to extinction? A) Gene flow is restricted and inbreeding occurs. B) Larger territories are available for smaller populations. C) Smaller populations have more genetic diversity. D) Fragmented habitats provide more resources for survival. Show Answer Correct Answer: A) Gene flow is restricted and inbreeding occurs. 27. What is a limiting factor in population dynamics? A) A limiting factor is a genetic trait that enhances survival. B) A limiting factor is an environmental condition that promotes growth. C) A limiting factor stops a population from growing large. D) A limiting factor is a type of predator that controls population size. Show Answer Correct Answer: C) A limiting factor stops a population from growing large. 28. Which of these describes a mutually beneficial relationship between two organisms? A) A dog with worms in its intestine. B) A turtle and a snail that both eat grass live in a river. C) A honeybee pollinating a plant and receiving nectar for food. D) A small fish attached to a shark, eating tiny pieces of the shark's food as it floats. Show Answer Correct Answer: C) A honeybee pollinating a plant and receiving nectar for food. 29. A wildlife corridor A) Allows safe passage of animals between two areas of land. B) Allows birds to swim. C) Prevents prey being consumed. D) Is an areas that can be developed for houses. Show Answer Correct Answer: A) Allows safe passage of animals between two areas of land. 30. The study of life. A) Biology. B) Bio. C) Biodiversity. D) Biome. Show Answer Correct Answer: A) Biology. 31. Which of the following is an abiotic factor of an ecosystem? A) Flowering plants. B) Grasses. C) Trees. D) Temperature. Show Answer Correct Answer: D) Temperature. 32. Decomposer organisms break down dead organisms, providing energy to carnivores A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 33. The percentage of Solar energy absorbed in the atmosphere is A) 0.59. B) 0.4. C) 0.6. D) 0.57. Show Answer Correct Answer: D) 0.57. 34. What is the significance of DNA sequencing in the study of phylogeny? A) It has decreased the accuracy of phylogenetic trees. B) It is only used for studying plants, not animals. C) It has made the study of phylogeny obsolete. D) It has allowed for the identification of relationships not previously known. Show Answer Correct Answer: D) It has allowed for the identification of relationships not previously known. 35. Development reduces biodiversity by: A) Fragmenting habitats. B) Increasing species. C) Preventing extinction. D) Creating habitats. Show Answer Correct Answer: A) Fragmenting habitats. 36. What is a diagram that shows the amount of energy that move from one feeding level to another A) Food web. B) Food chain. C) Energy pyramid. D) None of the above. Show Answer Correct Answer: C) Energy pyramid. 37. A community of organisms and their abiotic, or nonliving environment is called ..... A) Community. B) Ecosystem. C) Population. D) Ecology. Show Answer Correct Answer: B) Ecosystem. 38. A food chain shows how many possible paths along which energy can move through the ecosystem A) Two or three. B) Only one. C) Many. D) None of the above. Show Answer Correct Answer: B) Only one. 39. A salt marsh that helps prevent flooding of a coastal town is an example of what ecosystem service? A) Pest regulation. B) Carbon storage. C) Nutrient cycling. D) Buffering. Show Answer Correct Answer: D) Buffering. 40. Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls? A) The horned owl population will increase in the area. B) Horned owls will follow the field mice to a different area. C) The horned owl population will consume more field mice. D) Horned owls will change to a plant-based diet. Show Answer Correct Answer: B) Horned owls will follow the field mice to a different area. 41. Which symbols best describe mutualism? A) +, +. B) -, 0. C) +, -. D) +, 0. Show Answer Correct Answer: A) +, +. 42. An animal that hunts and kills another animal for food is a ..... A) Prey. B) Producer. C) Predator. D) Decomposer. Show Answer Correct Answer: C) Predator. 43. What is considered a mass extinction? A) The extinction of all Tasmanian tigers. B) A decrease in human population. C) The loss of a few species in a localized area. D) The extinction of all mammals. Show Answer Correct Answer: D) The extinction of all mammals. 44. What role do models play in scientific research according to the video? A) They are not useful in science. B) They are only used in mathematics. C) They are used to understand and explain scientific observations. D) They are used for decoration. Show Answer Correct Answer: C) They are used to understand and explain scientific observations. 45. This lake zone suffers from a lack of light and has limited photosynthesis: A) Benthic. B) Limnetic. C) Littoral. D) Profundal. Show Answer Correct Answer: D) Profundal. 46. All ecosystems contain at least one population of organisms. Which of the following could be considered a population? A) A pile of clamshells. B) A grove of apple trees. C) A mockingbird and its nest. D) A group of deer and mice. Show Answer Correct Answer: B) A grove of apple trees. 47. Which statement is correct about the pyramid of numbers? A) Higher the trophic level, lower the number of species and larger their size. B) Higher the trophic level, higher the number of species and larger their size. C) Higher the trophic level, lower the number of species and smaller their size. D) Higher the trophic level, higher the number of species and smaller their size. Show Answer Correct Answer: A) Higher the trophic level, lower the number of species and larger their size. 48. What does the PREDICTS project focus on? A) Studying the effects of solar flares. B) Predicting weather patterns. C) Mapping the ocean floors. D) Analyzing a global database of ecological communities. Show Answer Correct Answer: D) Analyzing a global database of ecological communities. 49. The best place to see the Rhinoceros are ..... A) Pench. B) Jim Corbett National Park. C) Gir Forest. D) Jaladpura Sanctuary. Show Answer Correct Answer: D) Jaladpura Sanctuary. 50. What is the purpose of a food chain? A) To describe how organizations get energy from eating other organizations. B) To help put nutrients back into the soil. C) To convert energy from the sun into food. D) To produce energy for the ecosystem. Show Answer Correct Answer: A) To describe how organizations get energy from eating other organizations. 51. Ilmu yang mempelajari tentang hubungan makhluk hidup dengan lingkungannya disebut ..... A) Taksonomi. B) Botani. C) Ekosistem. D) Ekologi. Show Answer Correct Answer: C) Ekosistem. 52. What cell part provides shape and structure for plant cells? A) Cell membrane. B) Cell wall. C) Cytoplasm. D) Chloroplasts. Show Answer Correct Answer: B) Cell wall. 53. Which characteristic of water vapour classifies it as a greenhouse gas? A) It absorbs then re-emits some of the long wave radiation emitted by the Earth's surface. B) It absorbs infra-red radiation but does not re-emit it. C) It absorbs UV radiation but does not re-emit it. D) It prevents short wave radiation from reaching the Earth's surface. Show Answer Correct Answer: A) It absorbs then re-emits some of the long wave radiation emitted by the Earth's surface. 54. What is a significant impact of human settlement on ecosystems? A) Increased biodiversity. B) Reduction in global temperatures. C) Declines in native flora and fauna. D) Stabilization of ecosystems. Show Answer Correct Answer: C) Declines in native flora and fauna. 55. What is one abiotic thing that could limit the population size of the primary consumer? A) Predator numbers. B) Water access. C) Prey available. D) Trees. Show Answer Correct Answer: B) Water access. 56. Population size can be determined by counting individuals or estimating? A) % Success. B) % Yield. C) % Cover. D) % Saturation. Show Answer Correct Answer: C) % Cover. 57. Blackspot fungus does not grow on roses when there is a large amount of sulfur dioxide in the atmosphere. This fungus serves as a ..... A) Bioindicator. B) Keystone species. C) Secondary messenger. D) Eco-service. Show Answer Correct Answer: A) Bioindicator. 58. Which of the following would be an example of a prey and predator relationship? A) Bee and a flower. B) Corn and a pig. C) Rabbit and a fox. D) Berry bush and a deer. Show Answer Correct Answer: C) Rabbit and a fox. 59. Red Foxes in Massachusetts in October 2020 A) Community. B) Organisms. C) Species. D) Population. Show Answer Correct Answer: D) Population. 60. Which best explains why internal fertilization is a greater advantage to an organism than external fertilization? A) Internal fertilization decreases the chance of mitotic cell division. B) Internal fertilization prevents mutations from occurring. C) Internal fertilization produces a large number of zygotes. D) Internal fertilization provides a protective environment for fertilization to occur. Show Answer Correct Answer: D) Internal fertilization provides a protective environment for fertilization to occur. ← 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