This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is true about the first (bottom) trophic level in an energy pyramid? A) It has the most available energy and includes all consumers. B) It has the most avaliable energy and includes all producers. C) It includes primary consumers (heterotrophs), which are known as herbivores. D) In includes primary consumers (autotrophs), which are known as herbivores. Show Answer Correct Answer: B) It has the most avaliable energy and includes all producers. 2. Hierarki satuan kehidupan penyusun ekosistem yang tepat adalah ..... A) Ekosistem $\rightarrow$ komunitas $\rightarrow$ populasi $\rightarrow$ individu. B) Individu $\rightarrow$ komunitas $\rightarrow$ populasi $\rightarrow$ ekosistem. C) Ekosistem $\rightarrow$ populasi $\rightarrow$ komunitas $\rightarrow$ individu. D) Individu $\rightarrow$ populasi $\rightarrow$ komunitas $\rightarrow$ ekosistem. Show Answer Correct Answer: D) Individu $\rightarrow$ populasi $\rightarrow$ komunitas $\rightarrow$ ekosistem. 3. What is the main purpose of ecosystem services? A) To provide essential benefits to humans and the environment. B) To harm humans and the environment. C) To limit the resources available to humans and the environment. D) To create imbalance in the ecosystem. Show Answer Correct Answer: A) To provide essential benefits to humans and the environment. 4. A consumer that eats ONLY other consumers (meat) is a ..... A) Omnivore. B) Herbivore. C) Prey. D) Carnivore. Show Answer Correct Answer: D) Carnivore. 5. Which is the best example of parasitism? A) A flea sucking on the blood of a dog. B) A clownfish living inside a sea anemone. C) A fox eating a rabbit. D) A flowering plant pollinated by a butterfly. Show Answer Correct Answer: A) A flea sucking on the blood of a dog. 6. What contributes to rising atmospheric concentrations of carbon dioxide and increases average global temperatures? A) An increase in shorter wave radiation emitted by the Earth. B) An increase in longer wave radiation emitted by the Earth. C) The depletion of the ozone in the stratosphere. D) An increase in the combustion of fossilised organic matter. Show Answer Correct Answer: D) An increase in the combustion of fossilised organic matter. 7. The Carbon Cycle shows ..... A) The movement of carbon on earth and how carbon enters the food chain. B) The movement of oxygen on earth and it enters the food chain. C) The movement of water on earth and how hydrogen enters the food chain. D) None of the above. Show Answer Correct Answer: A) The movement of carbon on earth and how carbon enters the food chain. 8. An increase in which ecosystem factor could cause a population decline in a bird species? A) Amount of food. B) Immigration. C) Emigration. D) Number of births. Show Answer Correct Answer: C) Emigration. 9. What book by Dr. Carl is recommended? A) The Science of Everything. B) Dr. Carl's Little Book of Climate Science. C) Short Back & Science. D) It's Not Rocket Science. Show Answer Correct Answer: B) Dr. Carl's Little Book of Climate Science. 10. What is the primary as well as secondary consumer in forest ecosystem? A) Man. B) Rabbit. C) Deer. D) Lion. Show Answer Correct Answer: A) Man. 11. Ecologists observe ecosystems by using their five A) Senses. B) Tools. C) Models. D) Scales. Show Answer Correct Answer: A) Senses. 12. What is a part of the food chain that makes its own food and nutrients? A) Sun. B) Consumer. C) Omnivore. D) Producer. Show Answer Correct Answer: D) Producer. 13. A symbiotic relationship where one species benefits and the other is not affected. A) Mutualism. B) Symbiosis. C) Parasitism. D) Commensalism. Show Answer Correct Answer: D) Commensalism. 14. A natural or human system's ability to recover after a disturbance is A) Adaptation. B) Commensalism. C) Ecosystem diversity. D) Resilience. Show Answer Correct Answer: D) Resilience. 15. Explain the concept of population in an ecosystem. A) The number of different ecosystems in an area. B) The weather patterns in an area. C) All the rocks and minerals in an area. D) All the organisms of the same species that live in the same area and interact with one another. Show Answer Correct Answer: D) All the organisms of the same species that live in the same area and interact with one another. 16. List three natural disruptions to ecosystems. A) Tsunamis, Urbanization, Deforestation. B) Wildfires, hurricanes, floods. C) Earthquakes. D) Droughts, Air Pollution, Climate Change. Show Answer Correct Answer: B) Wildfires, hurricanes, floods. 17. Organisms that digest molecules in organic material and convert them into inorganic forms are A) Primary producers. B) Detritivores. C) Decomposers. D) Primary consumers. Show Answer Correct Answer: C) Decomposers. 18. Which organisms use the sun's light energy? A) Consumers. B) Detritivores. C) Decomposers. D) Producers. Show Answer Correct Answer: D) Producers. 19. What cell part is the brain of the cell? A) Nucleus. B) Chloroplasts. C) Cell wall. D) Cytoplasm. Show Answer Correct Answer: A) Nucleus. 20. Which of the following best describes how ecosystems change due to seasonal variations? A) Ecosystems remain constant throughout the year. B) Ecosystems experience changes in species behavior and population dynamics. C) Ecosystems are unaffected by seasonal changes. D) Ecosystems only change due to human intervention. Show Answer Correct Answer: B) Ecosystems experience changes in species behavior and population dynamics. 21. Explain the concept of ecological succession. A) Ecological succession is the process by which ecosystems change and develop over time. B) Ecological succession is the immediate response of an ecosystem to a disturbance. C) Ecological succession refers to the extinction of species in an ecosystem. D) Ecological succession is the process of creating new species in an ecosystem. Show Answer Correct Answer: A) Ecological succession is the process by which ecosystems change and develop over time. 22. Discuss the impact of human activities on ecosystems. A) Ecosystems are not affected by human activities. B) Human activities have no impact on ecosystems. C) Human activities always improve ecosystems. D) Human activities can disrupt ecosystems by destroying habitats, reducing biodiversity, and altering natural processes. Show Answer Correct Answer: D) Human activities can disrupt ecosystems by destroying habitats, reducing biodiversity, and altering natural processes. 23. A key stone species is ..... A) The top carnivore. B) Has the largest population. C) Has the most specialized niche. D) Determines numbers and types of other species. Show Answer Correct Answer: D) Determines numbers and types of other species. 24. During a biology field trip, Ella and William used a Transect line across a habitat to ..... A) Measure temperature. B) Record weather. C) Observe plant growth. D) Count species. Show Answer Correct Answer: D) Count species. 25. A diagram that shows the flow of energy up the food chain. A) Secondary Consumer. B) Biological Magnification. C) Primary Consumer. D) Energy Pyramid. Show Answer Correct Answer: D) Energy Pyramid. 26. What is a significant impact of models in studying ecosystems? A) They can predict fashion trends. B) They are primarily used for social media. C) They are used to make movies. D) They can track climate change effects from genes to ecosystems. Show Answer Correct Answer: D) They can track climate change effects from genes to ecosystems. 27. Which of the following would be a density independent limiting factor? A) A new predator moving to an area. B) A virus spreading through a population. C) Birds competing for a limited amount of seeds. D) A forest fire burning down a forest. Show Answer Correct Answer: D) A forest fire burning down a forest. 28. What is the main focus of the video discussed? A) Investigating changes in past ecosystems to manage future ecosystems. B) Studying the Permian Extinction in detail. C) Understanding the basics of biology. D) Learning about the Cambrian explosion. Show Answer Correct Answer: A) Investigating changes in past ecosystems to manage future ecosystems. 29. What is a significant adaptation of sclerophyll plants to dry climates? A) Soft, water-retaining leaves. B) Ability to float on water. C) Hard, toxin-filled leaves. D) Brightly colored flowers. Show Answer Correct Answer: C) Hard, toxin-filled leaves. 30. An ecosystem is only consist of living things.Satu ekosistem hanya terdiri daripada benda hidup. A) Truebenar. B) Falsepalsu. C) All the above. D) None of the above. Show Answer Correct Answer: B) Falsepalsu. 31. An ..... is where living and non-living are in an area. A) Environment. B) Home. C) Ecosystem. D) Claim. Show Answer Correct Answer: A) Environment. 32. A relationship where one species benefits and the other is harmed A) Mutualism. B) Parasitism. C) Adaptations. D) Commensalism. Show Answer Correct Answer: B) Parasitism. 33. Which of the following ecosystems is where the freshwater river meets the ocean? A) Lakes and ponds. B) Marshes. C) Estuary. D) None of the above. Show Answer Correct Answer: C) Estuary. 34. Which organism is an example of a producer? A) Cheetah. B) Mushroom. C) Moth. D) Rose bush. Show Answer Correct Answer: D) Rose bush. 35. What types of organisms are producers? A) Heterotrophs. B) Autotrophs. C) Keystone species. D) Apex predators. Show Answer Correct Answer: B) Autotrophs. 36. This is the branch of science that studies how living things interact with one another and with their environment. A) Biome. B) Ecology. C) Ecosystem. D) Habitat. Show Answer Correct Answer: B) Ecology. 37. As space and nutrients become limited, which term best describes the number of bacteria an environment can support? A) Population density. B) Carrying capacity. C) Competition. D) Emigration. Show Answer Correct Answer: B) Carrying capacity. 38. What is the role of an oak tree in an ecosystem? A) It cannot make its own food. B) It uses the sun's energy to make food. C) It eats other organisms. D) It breaks down dead organisms and returns nutrients to the soil. Show Answer Correct Answer: B) It uses the sun's energy to make food. 39. What is the primary role of producers in an ecosystem? A) To compete with other species. B) To decompose organic matter. C) To consume other organisms. D) To produce energy from sunlight. Show Answer Correct Answer: D) To produce energy from sunlight. 40. The more diverse an ecosystem is ..... A) The more sustainable it is. B) The more threatened its populations are. C) The fewer varieties of species are present. D) The more similar the species will be. Show Answer Correct Answer: A) The more sustainable it is. 41. Density-dependent effects include: A) Competition, predation, disease, parasitism. B) Weather. C) Human activity. D) Soil quality. Show Answer Correct Answer: A) Competition, predation, disease, parasitism. 42. Plants, animals, bacteria and fungi would all be examples of ..... A) Abiotic Factors. B) Biotic Factors. C) Prey. D) Predators. Show Answer Correct Answer: B) Biotic Factors. 43. All the nonliving things in an environment are called the ..... factors. A) Biotic. B) Ecological. C) Inorganic. D) Abiotic. Show Answer Correct Answer: D) Abiotic. 44. Which of the following is a consumer that eats both plants and animals? A) Carnivore. B) Scavenger. C) Herbivore. D) Omnivore. Show Answer Correct Answer: D) Omnivore. 45. Silverfish live and hunt with army ants. They share the prey. They neither help nor harm the ants. A) Mutualism. B) Parasitism. C) Commensalism. D) None of the above. Show Answer Correct Answer: C) Commensalism. 46. Which of the following ecosystems is AQUATIC? A) Wetlands. B) Oceans. C) Forests. D) None of the above. Show Answer Correct Answer: B) Oceans. 47. A food chain is shown.plant $\rightarrow$ grasshopper $\rightarrow$ bird $\rightarrow$ snake $\rightarrow$ owlWhat will most likely occur if there is a decrease in the bird population? A) The snake population will increase. B) The grasshopper population will decrease. C) The plant population will decrease. D) The owl population will increase. Show Answer Correct Answer: C) The plant population will decrease. 48. Which major biome is home to cacti, mesquite, white thorn, pack rats, small reptiles, and coyotes? A) Desert. B) Taiga. C) Tundra. D) Grassland. Show Answer Correct Answer: A) Desert. 49. What Biome do we live in? A) Deciduous Forest. B) Tropical Rain Forest. C) Taiga. D) Grasslands. Show Answer Correct Answer: A) Deciduous Forest. 50. As you move upward, from level to level, in an energy pyramid, energy ..... A) Increases. B) Decreases. C) Stays the same. D) Increases exponentially. Show Answer Correct Answer: B) Decreases. 51. What are carnivores and provide an example? A) Kangaroos. B) Lions. C) Elephants. D) Giraffes. Show Answer Correct Answer: B) Lions. 52. Click Here to Access the ReadingGo to Reading 6According to Reading 6, which of the following best describes the food supply in the Serengeti? A) The serengeti is wet all year and food is easy to find. B) The serengeti is dry all year and food is hard to find. C) The serengeti has wet and dry seasons, so the amount and quality of food varies. D) The serengeti has a wet and dry season but the plants have evolved to remain fully productive all year. Show Answer Correct Answer: C) The serengeti has wet and dry seasons, so the amount and quality of food varies. 53. Heterotrophs use the energy stored in sugars they produce to carry out life functions. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 54. What does primary succession begin with? A) A mature forest. B) A barren landscape. C) A developed ecosystem. D) A diverse community. Show Answer Correct Answer: B) A barren landscape. 55. Which of the following is an example of a population? A) A single Atlantic salmon. B) All the Atlantic salmon in a river. C) All the living organisms in a river. D) All living and non-living components in a river. Show Answer Correct Answer: B) All the Atlantic salmon in a river. 56. How does climate change affect ecosystems over time? A) It causes ecosystems to become more stable. B) It leads to shifts in species distribution and habitat loss. C) It has no impact on ecosystems. D) It only affects aquatic ecosystems. Show Answer Correct Answer: B) It leads to shifts in species distribution and habitat loss. 57. The process by which different plant life progressively replaces other plant life in an area over time. A) Mass Extinction. B) Succession. C) Background Extinction. D) Evolution. Show Answer Correct Answer: B) Succession. 58. When a disturbance affects an existing community but doesn't completely destroy it what occurs? A) Secondary adaptation. B) Primary succession. C) Primary adaptation. D) Secondary succession. Show Answer Correct Answer: D) Secondary succession. 59. An individual who only eats meat is called a(n) A) Carnivore. B) Decomposer. C) Herbivore. D) Omnivore. Show Answer Correct Answer: A) Carnivore. 60. Which of the following describes the role of mRNA? A) Carries amino acids to the growing chain. B) Copy of DNA made in the nucleus and read at the ribosome. C) Copy of tRNA made in the ribosome. D) The molecule that codes for ribosomes. Show Answer Correct Answer: B) Copy of DNA made in the nucleus and read at the ribosome. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books