This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the role of the stem in a plant? A) Absorbing water and nutrients. B) Supporting the plant and transporting nutrients. C) Conducting photosynthesis. D) Reproducing seeds. Show Answer Correct Answer: B) Supporting the plant and transporting nutrients. 2. Apabila jumlah karbondioksida dalam suatu ekosistem berkurang, maka organisme yang pertama kali langsung merasakan akibatnya adalah ..... A) Karnivora. B) Produsen. C) Pengurai. D) Herbivora. Show Answer Correct Answer: B) Produsen. 3. The relationship between seaweed and sea turtles is an example of A) Decomposition. B) Predator and prey. C) Competition. D) Producer and consumer. Show Answer Correct Answer: D) Producer and consumer. 4. Why are many farmers encouraged to plant different types of crops on the same land throughout the year? A) It prevents insects from destroying crops. B) It provides more food to other countries. C) It allows for more genetic variation in plants. D) It helps to preserve the quality of the soil. Show Answer Correct Answer: D) It helps to preserve the quality of the soil. 5. The Australian pitcher plant (Cephalotus follicularis) is a green plant that traps and feeds on flies and other live insects. What is this plant's mode of nutrition? A) Producer and saprotroph. B) Autotroph and detritivore. C) Autotroph and heterotroph. D) Consumer and saprotroph. Show Answer Correct Answer: C) Autotroph and heterotroph. 6. Gas analysis of ice cores in Antarctica has shown which trend over the last 100 years? A) Atmospheric concentrations of greenhouse gases have decreased. B) Global temperatures have decreased. C) Atmospheric concentrations of greenhouse gases have increased. D) There has been no change in atmospheric concentrations of greenhouse gases. Show Answer Correct Answer: C) Atmospheric concentrations of greenhouse gases have increased. 7. Estuaries form where A) A lake evaporates. B) A river meets the sea. C) A river becomes dammed. D) A wetland becomes filled in. Show Answer Correct Answer: B) A river meets the sea. 8. All of the grasses, deer, birds, wolves, rocks and weather in an area create what? A) A community. B) A population. C) An organism. D) An ecosystem. Show Answer Correct Answer: D) An ecosystem. 9. Earth has a fixed amount of ..... A) Trees. B) Carbon. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: B) Carbon. 10. Which definition matches species? A) All non-living parts of an area. B) All organisms in one ecosystem. C) Organisms that interbreed producing fertile offspring. D) Organisms that share a habitat. Show Answer Correct Answer: C) Organisms that interbreed producing fertile offspring. 11. Term given to describe the 2 part (name) naming system is: A) 2 scientific names. B) Binomial nomenclature. C) Dichotmous key. D) Binomial key. Show Answer Correct Answer: B) Binomial nomenclature. 12. The adaptation of a species, its needs, the territory it can live in, etc., are known as: A) Ecological characteristics. B) Group adaptation. C) Intraspecific interaction. D) Ecological niche. Show Answer Correct Answer: A) Ecological characteristics. 13. Which of the following describes water, food, competition and mates? A) Water works. B) Limiting factors. C) Carrying capacity. D) Resources. Show Answer Correct Answer: B) Limiting factors. 14. What are abiotic factors? A) Non-living factors like temperature and moisture. B) Factors influenced by living things like availability of food. C) Organisms of the same species. D) Animals and plants adapting to their environment. Show Answer Correct Answer: A) Non-living factors like temperature and moisture. 15. If conditions fall above or below the optimum range an organisms will experience A) Death. B) Tolerance. C) Adaptation. D) Stress. Show Answer Correct Answer: D) Stress. 16. What percentage of energy is passed on for storage to each tropic level? A) 50%. B) 100%. C) 90%. D) 10%. Show Answer Correct Answer: D) 10%. 17. Which of the animals is a vertebrate? A) Ladybug. B) Snake. C) Snail. D) Butterfly. Show Answer Correct Answer: B) Snake. 18. Where are autotrophs found in food chains/webs A) In the middle. B) At every level. C) At the top. D) At the first level. Show Answer Correct Answer: D) At the first level. 19. What does a significant reduction in a species' population lead to? A) An increase in biodiversity. B) A decrease in genetic problems. C) A significant reduction in the gene pool. D) An increase in land availability. Show Answer Correct Answer: C) A significant reduction in the gene pool. 20. Living is called: A) Biotic. B) Dead. C) Alive. D) Abiotic. Show Answer Correct Answer: A) Biotic. 21. A relationship between two organisms in which one organism benefits and the other is harmed. A) Mutualism. B) Commensalism. C) Parasitsm. D) Competition. Show Answer Correct Answer: C) Parasitsm. 22. The ecosytem is the physical environment in which a species lives and to which it is adapted. A ecosystems's features are determined mainly by abiotic factors such as temperature and rainfall. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. Why doesn't exponential growth last? A) Predators disappear. B) Resources become limited. C) Immigration stops. D) Populations stop reproducing. Show Answer Correct Answer: B) Resources become limited. 24. Many insects are attracted to light and move toward it. This is an example of what kind of behavior? A) Habituation. B) Conditioning. C) Taxis. D) Imprinting. Show Answer Correct Answer: C) Taxis. 25. Karen is classifying a group of organisms that are either primary producers or consumers. What is the direct source of energy for all of the consumers? A) Producers only. B) Other consumers only. C) Either producers or other consumers. D) Nonliving sources, such as sunlight. Show Answer Correct Answer: C) Either producers or other consumers. 26. Which of the following describes parasitism? A) Barnacle sticking on the shell of an oyster. B) An orchid living on a truck of a mahogany tree. C) An insect larva staying under the leaves of a plant. D) Fern plant growing on a trunk of a tree. Show Answer Correct Answer: C) An insect larva staying under the leaves of a plant. 27. Which represents primary succession? A) Mature forest $\rightarrow$ shrubs. B) Bare rock $\rightarrow$ lichens $\rightarrow$ moss $\rightarrow$ grasses $\rightarrow$ trees. C) Herbivores $\rightarrow$ carnivores. D) Grass $\rightarrow$ shrubs $\rightarrow$ trees. Show Answer Correct Answer: B) Bare rock $\rightarrow$ lichens $\rightarrow$ moss $\rightarrow$ grasses $\rightarrow$ trees. 28. (a):The largest number of individuals that an environment can support. A) A. Carrying Capacity. B) Biodiversity. C) Limiting Factors. D) None of the above. Show Answer Correct Answer: A) A. Carrying Capacity. 29. Which of the following is NOT a reason for the decline in ecosystems? A) Introduction of native species. B) Overpopulation of terrestrial and marine resources. C) Spread of introduced herbivores, predators, weeds, and disease. D) Habitat loss and fragmentation. Show Answer Correct Answer: A) Introduction of native species. 30. The basic unit of structure and function in the human body is the ..... A) Tissue. B) Organ system. C) Organ. D) Cell. Show Answer Correct Answer: D) Cell. 31. Breaks down dead organisms A) Parasite. B) Decomposer. C) Scavenger. D) Autotroph. Show Answer Correct Answer: B) Decomposer. 32. The average weather pattern of a region over time A) Ecosystem disruption. B) Adapted. C) Climate. D) Habitat. Show Answer Correct Answer: C) Climate. 33. The first organism in a food chain is always a: A) Producer. B) Consumer. C) Decomposer. D) Any of the above. Show Answer Correct Answer: A) Producer. 34. Two factors that determine the type of biome that will exist in an area are: ..... and ..... A) Precipitation, Pollution. B) Longitude, Precipitation. C) Latitude, Longitude. D) Latitude, Precipitation. Show Answer Correct Answer: D) Latitude, Precipitation. 35. Which of the following is a symbiotic relationship in which one organism benefits while the other is unaffected? A) Microbiomes. B) Mutualism. C) Parasitism. D) Commensalism. Show Answer Correct Answer: D) Commensalism. 36. The total number of organism at each trophic level in the food chain is known as ..... A) Biomass. B) Efficiency. C) Pyramid of numbers. D) Food web. Show Answer Correct Answer: C) Pyramid of numbers. 37. Explain what a habitat is and provide an example. A) A habitat is a man-made structure like a building for birds. B) An example of a habitat is a desert for polar bears. C) An example of a habitat is a coral reef for marine organisms. D) A habitat is a type of food that animals eat, such as grass for lions. Show Answer Correct Answer: C) An example of a habitat is a coral reef for marine organisms. 38. A herd of zebras would be considered a A) Community. B) Population. C) Ecosystem. D) Species. Show Answer Correct Answer: B) Population. 39. How does competition affect population? A) Most populations do not have competition. B) It maximizes the carrying capacity of an ecosystem. C) It limits population sizes and drives natural selection. D) It benefits both species and increases their populations. Show Answer Correct Answer: C) It limits population sizes and drives natural selection. 40. Which factors would most likely cause an increase in a predator population? A) A decrease in the herbivore population and an increase in competition for food. B) A decrease in contagious diseases and an increase in available living space. C) An increase in available living space and a decrease in water supply. D) An increase in competition for food and a decrease in water supply. Show Answer Correct Answer: B) A decrease in contagious diseases and an increase in available living space. 41. Energy flows from a lower trophic level to a higher level as organisms are consumed. Approximately how much energy is used for metabolic functions or is released as heat, and therefore is not available to the next trophic level of organisms? A) 90%. B) 10%. C) 30%. D) 75%. Show Answer Correct Answer: A) 90%. 42. A ..... is the use of evidence to say why one idea is the best. A) Hypothesis. B) Arguement. C) Claim. D) Answer. Show Answer Correct Answer: B) Arguement. 43. How do cooperative behaviors increase fitness? A) They ensure every organism in a colony survives. B) They make sure that every member of a colony gets along. C) They increase the fitness of the population, though may harm the individual. D) They allow each organism to obtain the most resources possible. Show Answer Correct Answer: C) They increase the fitness of the population, though may harm the individual. 44. What is phototropism? A) When a plant loses it's leaves in the fall. B) It is what causes a plants stems to grow upwards. C) When a plant grows towards light. D) A plants response to touch. Show Answer Correct Answer: C) When a plant grows towards light. 45. What does a Secondary Consumer eat? A) Producers. B) Secondary Consumers. C) Primary Consumers. D) Tertiary Consumers. Show Answer Correct Answer: C) Primary Consumers. 46. Which statement best explains why animals are considered heterotrophic? A) They are able to produce food through the process of photosynthesis. B) They are able to produce food through the process of respiration. C) They are able to obtain nutrients by decomposing plant and animal tissue. D) They are able to obtain nutrients by consuming other organisms or their products. Show Answer Correct Answer: D) They are able to obtain nutrients by consuming other organisms or their products. 47. Which organisms are heterotrophs? A) Consumers. B) Photosynthesizers. C) Producers. D) Plants. Show Answer Correct Answer: A) Consumers. 48. Select the correct plant or animal that can be found in the rainforest ecosystem. A) Pine tree. B) Snake. C) Dog. D) Elephant. E) Zebra. Show Answer Correct Answer: B) Snake. 49. A producer is ..... A) A predator that hunts prey. B) An animal that has live young. C) An animal that only eats plants. D) Something that makes its own food. Show Answer Correct Answer: D) Something that makes its own food. 50. The geographic grid lines on the globe that extend vertically. A) Longitude. B) Biome. C) Eutrophication. D) Habitat Fragmentation. Show Answer Correct Answer: A) Longitude. 51. Ecosystems can be delicate. Our nutrient cycles are changing because of ..... A) Human activity. B) Lack of water. C) Excess sunlight. D) None of the above. Show Answer Correct Answer: A) Human activity. 52. Carbon dioxide in the atmosphere enters the biotic parts of the biosphere through ..... A) Burning of forests. B) Photosynthesis. C) Combustion of fossil fuels. D) All of these. Show Answer Correct Answer: B) Photosynthesis. 53. A place where plants and animals live A) Adapted. B) Habitat. C) Climate. D) Biosphere. Show Answer Correct Answer: B) Habitat. 54. Sistem ekologi yang terbentuk oleh hubungan timbal balik atau interaksi antara makhluk hidup dengan lingkungan abiotiknya disebut ..... A) Ekolokasi. B) Komunitas. C) Ekosistem. D) Populasi. Show Answer Correct Answer: C) Ekosistem. 55. Which kind of organism is an autotroph? A) Producer. B) Decomposer. C) Consumer. D) Herbivore. Show Answer Correct Answer: A) Producer. 56. What is one way that biotechnology can impact human health? A) It only affects agricultural productivity. B) It can lead to the development of new medical treatments. C) It has no impact on human health. D) It is unrelated to human health. Show Answer Correct Answer: B) It can lead to the development of new medical treatments. 57. What type of ecosystem is a garden? A) Artificial. B) Natural. C) Semi natural. D) Synthetic. Show Answer Correct Answer: A) Artificial. 58. What is an example of a carnivore A) A wolf. B) A rabbit. C) A human. D) None of the above. Show Answer Correct Answer: A) A wolf. 59. Both the alga and the fungus are benefited from their relationship in a lichen. This relationship is one of ..... A) Parasitism. B) Symbolism. C) Mutualism. D) Coomensalism. Show Answer Correct Answer: C) Mutualism. 60. Two factors that increase population size A) Birth Rate, Immigration. B) Death Rate, Immigration. C) Death Rate, Emigration. D) Birth Rate, Emigration. Show Answer Correct Answer: A) Birth Rate, Immigration. ← 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