This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Consists of all the living and non-living things in a given area that interact with each other. A) Ecology. B) Environment. C) Ecosystem. D) Organsim. Show Answer Correct Answer: C) Ecosystem. 2. A relationship where both species benefit A) Commensalism. B) Parasitism. C) Mutualism. D) Adaptation. Show Answer Correct Answer: C) Mutualism. 3. Di bawah ini adalah contoh hewan herbivora, karnivora, dan omnivora berturut-turut adalah ..... A) Singa, kambing, ayam. B) Kambing, kelinci, serigala. C) Kambing, singa, ayam. D) Ayam, serigala, kambing. Show Answer Correct Answer: C) Kambing, singa, ayam. 4. What is a community? A) A group of producers and consumers living and interacting in an area. B) A group of species living and interacting in an area. C) A group of organisms living and interacting in an area. D) A group of populations living and interacting in an area. Show Answer Correct Answer: D) A group of populations living and interacting in an area. 5. Which of the following statements about radioactive decay is true? A) All isotopes decay at the same rate. B) The rate of radioactive decay increases with time. C) Radioactive decay occurs at a regular measurable rate for each isotope. D) The rate of decay for most isotopes is unknown. Show Answer Correct Answer: C) Radioactive decay occurs at a regular measurable rate for each isotope. 6. Simple model for showing how matter and energy move through an ecosystem A) Habitat. B) Food web. C) Trophic levels. D) Food chain. Show Answer Correct Answer: D) Food chain. 7. Biodiversity is important because: A) Stops succession. B) It increases extinction. C) Limits energy flow. D) It increases ecosystem stability. Show Answer Correct Answer: D) It increases ecosystem stability. 8. Which species are best able to occupy the same space? A) Those that eat the same foods. B) Those that compete for the same resources. C) Those whose needs differ significantly from each other. D) Those that have a predator/prey relationship. Show Answer Correct Answer: C) Those whose needs differ significantly from each other. 9. True or False:Succession occurs in most cases by each species altering its environment in ways to make it easier for other species to compete for resources and survive. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. What type of symbiotic relationship benefits both species involved? A) Parasitism. B) Amensalism. C) Commensalism. D) Mutualism. Show Answer Correct Answer: D) Mutualism. 11. A wrasse fish feeds on the parasites found on the black sea bass's body. Both species benefit. A) Mutualism. B) Parasitism. C) Commensalism. D) None of the above. Show Answer Correct Answer: A) Mutualism. 12. True/False:Based on the efficiencies you calculated for the previous three questions, this ecosystem is probably terrestrial. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Which group contains only autotrophs? A) Elephants, fungi, fish. B) Grass, rose bush, photosynthetic bacteria. C) Coral animals without algae. D) Snails, fungi, carnivores. Show Answer Correct Answer: B) Grass, rose bush, photosynthetic bacteria. 14. A group of one or more species living in a certain habitat is called: A) Population. B) City. C) Habitat. D) Ecosystem. Show Answer Correct Answer: A) Population. 15. The quantity of water on Earth has not changed greatly over millions of years. Which inference is best supported by this observation? A) Water vapor evaporates in the air. B) Precipitation does not require an input of energy. C) Rates of evaporation have increased over time. D) The rate of precipitation is usually about equal to the rates of transpiration and evaporation. Show Answer Correct Answer: D) The rate of precipitation is usually about equal to the rates of transpiration and evaporation. 16. Which of the following ecosystems has a variety of different animals and plants? A) Marshes. B) Forests. C) Oceans. D) None of the above. Show Answer Correct Answer: B) Forests. 17. All of the following are examples of limiting factors for populations except A) Weather. B) Space. C) Time. D) Food. Show Answer Correct Answer: C) Time. 18. What is the relationship between the koala and the wombat according to the phylogenetic tree discussed? A) They are not related at all. B) Wombats are considered predators of koalas. C) Koalas are ancestors of wombats. D) They are closely related to each other. Show Answer Correct Answer: D) They are closely related to each other. 19. Abiotic or biotic factors that limit the size of the population; disease, competition, predators, drought, space, etc A) Biotic factors. B) Limiting factors. C) Abiotic factors. D) Carrying capacity. Show Answer Correct Answer: B) Limiting factors. 20. What is the definition of Habitat? A) The place where an organism (animal, plant or microorganism) lives. B) A group of organisms of the same species in a particular area. C) The areas of the world where the same species is found. D) A group of organisms of the same species in a particular area. Show Answer Correct Answer: A) The place where an organism (animal, plant or microorganism) lives. 21. Mushrooms are an example of a A) Archaebacteria. B) Fungi. C) Plant. D) Animal. Show Answer Correct Answer: B) Fungi. 22. A forest food chain contains a tree, grasshopper, lizard, bird, and wolf. Which organism(s) are consumers? A) All of the organisms. B) Wolf, lizard, and bird. C) Wolf. D) Wolf, lizard, bird, and grasshopper. Show Answer Correct Answer: D) Wolf, lizard, bird, and grasshopper. 23. A group of populations that inhabit the same area. A) Habitat. B) Population. C) Community. D) Environment. Show Answer Correct Answer: C) Community. 24. Interspecific competition is A) Different species competing for the exactly the same resources. B) Different species competing for similar resources. C) The same species competing for exactly the same resources. D) The same species competing for similar resources. Show Answer Correct Answer: B) Different species competing for similar resources. 25. A heterotroph is an organism which cannot synthesis its own food but depends on various external sources.The following are types of heterotrophs EXCEPT A) Saprotrophic. B) Chemotrophic. C) Parasitic. D) Holozioc. Show Answer Correct Answer: B) Chemotrophic. 26. Laney is asked to research an organism that performs denitrification. Which strategy is the most likely to be successful? A) Look for ocean-dwelling organisms that perform chemosynthesis. B) Look for soil bacteria that convert atmospheric nitrogen to nitrates. C) Look for phytoplankton that perform photosynthesis. D) Look for soil bacteria that convert nitrates to nitrogen gas. Show Answer Correct Answer: D) Look for soil bacteria that convert nitrates to nitrogen gas. 27. Organells that are only available in plant cells are A) Chloroplast, lysosomes, membrane cell. B) Chloroplast, cell wall, vacuole (large). C) Chloroplast, ribosomes, membrane cell. D) Chloroplast, flagella, membrane cell. Show Answer Correct Answer: B) Chloroplast, cell wall, vacuole (large). 28. A fungus is found growing on dead leaves in the forest floor. The fungus is an example of a- A) Carnivore. B) Decomposer. C) Producer. D) Predator. Show Answer Correct Answer: B) Decomposer. 29. Extinction rate that exceeds the average extinction rate is called: A) Succession. B) Background Extinction. C) Mass Extinction. D) Evolution. Show Answer Correct Answer: C) Mass Extinction. 30. Which statement correctly describes an advantage and disadvantage of food chains and food webs? A) Food chains are more realistic, but food webs are simpler. B) Food chains show multiple feeding paths, but food webs show only one. C) Food chains are simple and show a single energy pathway, while food webs are more complex and realistic. D) Food chains include more organisms than food webs. Show Answer Correct Answer: C) Food chains are simple and show a single energy pathway, while food webs are more complex and realistic. 31. Madar and Hiptage seeds are pollinated by ..... ? A) Insects. B) Air. C) Water. D) Soil. Show Answer Correct Answer: B) Air. 32. What is the niche of decomposer in the soil?Apakah nic pengurai di dalam tanah? A) They serve as food for the consumerMereka merupakan makanan untuk pengguna. B) They feed all other organisms in the soilMereka memakan semua organisma di dalam tanah. C) They breakdown all dead organisms to provide nutrients to the soilMereka mengurai semua organisma untuk membekalkan nutrien kepada tanah. D) None of the above. Show Answer Correct Answer: C) They breakdown all dead organisms to provide nutrients to the soilMereka mengurai semua organisma untuk membekalkan nutrien kepada tanah. 33. What is the term used to describe the process by which microorganisms break down organic matter and release energy? A) Photosynthesis. B) Decomposition. C) Primary production. D) Respiration. Show Answer Correct Answer: B) Decomposition. 34. Which of the following describes a carnivore? A) An organism that eats meat. B) An organism that eats meat and plants. C) An organisms that only eats plants. D) None of the above. Show Answer Correct Answer: A) An organism that eats meat. 35. How do ecosystems obtain energy in environments that have no light? A) Through chemosynthetic organisms. B) Without light the organisms will need to move or they may go extinct. C) Through photosynthetic organisms. D) All ecosystems have some light. Show Answer Correct Answer: A) Through chemosynthetic organisms. 36. What are consumers that eat only animals A) Herbivores. B) Carnivores. C) Omnivores. D) None of the above. Show Answer Correct Answer: B) Carnivores. 37. What is required for the seeds of Banksia to be released? A) Water immersion. B) Fire. C) Animal digestion. D) Freezing temperatures. Show Answer Correct Answer: B) Fire. 38. Why are mushrooms important to the food chain? A) They consume excess herbivores in the ecosystem. B) They recycle oxygen into the atmosphere. C) They recycle nutrients into the ecosystem. D) They produce food energy for other living things. Show Answer Correct Answer: C) They recycle nutrients into the ecosystem. 39. Which organism is a heterotroph? A) Coral (via algae). B) Photosynthetic bacteria. C) Elephant. D) Rose bush. Show Answer Correct Answer: C) Elephant. 40. If more rabbits are in grassland ecosystem A) Tough competition for food among rabbits will be seen. B) No chage in ecosystem. C) More rabbits will be seen. D) Growth of grass will not be affected. Show Answer Correct Answer: A) Tough competition for food among rabbits will be seen. 41. Network of interconnected food chains A) Food web. B) Trophic levels. C) Ecosystem. D) Biological community. Show Answer Correct Answer: A) Food web. 42. Factors that affect ecosystem success such as wind speed and temperature are known as: A) Biomic. B) Biotic. C) Environmental. D) Abiotic. Show Answer Correct Answer: D) Abiotic. 43. What causes trophic cascades? A) Pollution. B) The removal of a keystone species. C) Increasing the number of producers. D) Introducing a new species to an ecosystem. Show Answer Correct Answer: B) The removal of a keystone species. 44. A group of gray wolves in Yellowstone Park is a ..... A) Population. B) Community. C) All the above. D) None of the above. Show Answer Correct Answer: A) Population. 45. What term describes how individual organisms interact over things such as habitat, food and mates? A) Competition. B) Conglomeration. C) Compatability. D) Construction. Show Answer Correct Answer: A) Competition. 46. The following are all characteristics of life EXCEPT: A) Respond stimuli. B) Reproduce. C) Eat food. D) Made of cell(s). Show Answer Correct Answer: C) Eat food. 47. What breaks down biotic wastes and dead organisms and returns the raw materials to the ecosystem A) A decomposer. B) A producer. C) A consumer. D) None of the above. Show Answer Correct Answer: A) A decomposer. 48. What percentage of the Biology EOC in North Carolina is focused on ecosystems? A) 10-15%. B) 33-38%. C) 18-22%. D) 25-30%. Show Answer Correct Answer: C) 18-22%. 49. Which of the following is NOT a type of heterotroph? A) Saprotroph. B) Consumer. C) Autotroph. D) Detritovore. Show Answer Correct Answer: C) Autotroph. 50. Cycles among the hydrosphere, atmosphere, and geosphere-sometimes outside the biosphere and Sometimes in it. A) Water cycle. B) Carbon cycle. C) Phosphorus cycle. D) None of the above. Show Answer Correct Answer: A) Water cycle. 51. Which group of plants absorb water like a sponge? A) Vascular. B) Nonvascular. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonvascular. 52. What factor is NOT mentioned as a reason for ecosystem changes? A) Volcanic eruptions. B) Solar flares. C) Changes in methanogens. D) Meteorite impacts. Show Answer Correct Answer: B) Solar flares. 53. Describe the role of producers in a food chain. A) Producers provide energy for other organisms in the food chain. B) Producers are only found at the end of the food chain. C) Producers have no role in providing energy for other organisms in the food chain. D) Producers consume energy from other organisms in the food chain. Show Answer Correct Answer: A) Producers provide energy for other organisms in the food chain. 54. What will happen if a human cell is stored in a saline solution (salty)? A) The cell will lose water and causes the cell to shrink (osmosis). B) The cell will lose water and causes the cell to shrink (diffusion). C) The water will penetrate into the cell and causes the cell to be fatter (osmosis). D) The water will penetrate into the cell and causes the cell to be fatter (diffusion). Show Answer Correct Answer: B) The cell will lose water and causes the cell to shrink (diffusion). 55. Give an example of a producer in a food chain and explain its role. A) A lion, which preys on other animals in the food chain. B) A chef, who cooks the food for the animals in the food chain. C) A rock, which has no role in the food chain. D) An example of a producer in a food chain is a plant. Its role is to convert sunlight into energy through photosynthesis, providing food and energy for the rest of the food chain. Show Answer Correct Answer: D) An example of a producer in a food chain is a plant. Its role is to convert sunlight into energy through photosynthesis, providing food and energy for the rest of the food chain. 56. What is the main goal of studying year 11 biology module 4 on ecosystem dynamics? A) To analyze evidence that present-day organisms have evolved from organisms in the past. B) To memorize the names of all small mammals in Australia. C) To understand the chemical composition of Australian soil. D) To study the climate patterns of Australia over the last century. Show Answer Correct Answer: A) To analyze evidence that present-day organisms have evolved from organisms in the past. 57. Which of the following is most likely to occur if an organism's environment is outside the organism's range of tolerance? A) Organisms develop mutualistic relationships. B) Organisms produce more offspring to increase the chance of survival. C) Growth of the organisms increases. D) Organisms fail to reproduce. Show Answer Correct Answer: D) Organisms fail to reproduce. 58. What significant event in Australia's history contributed to its unique fauna and flora? A) The first human landing on the Australian continent. B) Australia breaking away from the larger landmass of Gondwana. C) The introduction of European settlers to Australia. D) The invention of agriculture in Australia. Show Answer Correct Answer: B) Australia breaking away from the larger landmass of Gondwana. 59. A group of food chains that overlap. A) Producer. B) Food web. C) Consumer. D) Food chain. Show Answer Correct Answer: B) Food web. 60. Which symbols best describe parasitism? A) -, 0. B) +, 0. C) +, -. D) +, +. Show Answer Correct Answer: C) +, -. ← 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 7Class 12 Biology Chapter 14 Ecosystem Quiz 8Class 12 Biology Chapter 14 Ecosystem Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books