This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 14 Ecosystem – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 16 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Over a long period of time, a lake ecosystem can become a forest ecosystem. The decomposition of dead plant and animal matter is a part of this process. Which of the following organisms would most likely be responsible for decomposing the dead plant and animal matter in the lake? A) Grasses. B) Clams. C) Bacteria. D) Snails. Show Answer Correct Answer: C) Bacteria. 2. Which term describes the ability of the natural or human system to recover after a disturbance? A) Resilience. B) Biodiversity. C) Ecosystem. D) Species. Show Answer Correct Answer: A) Resilience. 3. Cattle egrets are birds that forage in fields among cattle. The egrets get easy access to food and the cattle don't care if they are there or not. A) Competition. B) Commensalism. C) Mutualism. D) Parasitism. Show Answer Correct Answer: B) Commensalism. 4. What does sustainability mean? A) Avoiding the depletion of natural resources in order to maintain ecological balance. B) Using only fossil fuels. C) Using only non-renewable resources. D) None of the above. Show Answer Correct Answer: A) Avoiding the depletion of natural resources in order to maintain ecological balance. 5. What is considered the basic minimum success criteria for students in this module? A) To list all marsupials found in Australia. B) To draw a detailed map of Australia's ecosystems. C) To explain the photosynthesis process in Australian plants. D) To describe some changes in small animal populations in Australia. Show Answer Correct Answer: D) To describe some changes in small animal populations in Australia. 6. Gir forest is famous for its ..... A) Nilgai. B) Leopard. C) Asiatic Lions. D) Jackal. Show Answer Correct Answer: C) Asiatic Lions. 7. What is nitrogen fixation? A) The breakdown of nitrogen compounds in soil. B) The absorption of nitrogen by animals. C) The conversion of atmospheric nitrogen into a form plants can use. D) The process of nitrogen being released into the atmosphere. Show Answer Correct Answer: C) The conversion of atmospheric nitrogen into a form plants can use. 8. What does carrying capacity mean? A) The number of organisms an ecosystem can sustain. B) The total number of species living in an ecosystem. C) The amount of abiotic factors present in the environment. D) The number of offspring one mother can have in a year. Show Answer Correct Answer: A) The number of organisms an ecosystem can sustain. 9. Occurs when 2 or more organism use the same resource A) Mutualism. B) Parasitism. C) Commensalism. D) Competition. Show Answer Correct Answer: D) Competition. 10. Which is the smallest level of an ecosystem? A) Population. B) Community. C) Organsism. D) Ecosystem. Show Answer Correct Answer: C) Organsism. 11. What does 'Anthropocene' signify? A) A period of minimal human impact. B) The beginning of the Ice Age. C) The age of dinosaurs. D) A period of significant human impact on Earth's geology and ecosystems. Show Answer Correct Answer: D) A period of significant human impact on Earth's geology and ecosystems. 12. What are herbivores and provide an example? A) Herbivores are animals that primarily feed on rocks. An example of a herbivore is a lion. B) Herbivores are animals that primarily feed on air. An example of a herbivore is a bird. C) Herbivores are animals that primarily feed on other animals. An example of a herbivore is a shark. D) Herbivores are animals that primarily feed on plants. An example of a herbivore is a rabbit. Show Answer Correct Answer: D) Herbivores are animals that primarily feed on plants. An example of a herbivore is a rabbit. 13. An individual who eats plants and animals is called a(n) A) Carnivore. B) Omnivore. C) Decomposer. D) Herbivore. Show Answer Correct Answer: B) Omnivore. 14. A piece of equipment that can be used to sample ecosystems is called: A) Quadraped. B) Quadmouse. C) Quadrat. D) Quadrant. Show Answer Correct Answer: C) Quadrat. 15. Second Trophic Level A) Producer. B) Primary Consumer. C) Tertiary Consumer. D) Secondary Consumer. Show Answer Correct Answer: B) Primary Consumer. 16. The place where an organism lives is its ..... A) Community. B) Ecosystem. C) Habitat. D) Abiotic. Show Answer Correct Answer: C) Habitat. 17. What are the 2 types of niche? A) Ecological & species. B) Ecosystem & species. C) Ecosystem & population. D) Ecological & population. Show Answer Correct Answer: A) Ecological & species. 18. An example of Succulent plant is A) Pistia. B) Neem. C) Cactus. D) Banyan. Show Answer Correct Answer: C) Cactus. 19. For a given area and time period, the amount of solar energy converted to chemical energy in organic compounds is called A) Primary production. B) Secondary production. C) Secondary succession. D) Primary succession. Show Answer Correct Answer: A) Primary production. 20. The highest amount of an environmental factor that an organism can tolerate: A) Range of Tolerance. B) Upper Limit. C) Lower Limit. D) Invasive Species. Show Answer Correct Answer: B) Upper Limit. 21. Which is the best way to protect bald eagles from extinction? A) Protect their natural habitats. B) Create clones of the most fit eagles. C) Increase natural predators. D) Provide them more food. Show Answer Correct Answer: A) Protect their natural habitats. 22. When threatened, some animals make warning sounds to help other animals escape a predator. A) Behavioral Adaptation. B) Structural Adaptation. C) Physiolgoical. D) None of the above. Show Answer Correct Answer: A) Behavioral Adaptation. 23. Juanita is studying the food web of the open ocean. Which step would be most useful for her to follow to identify the primary producers of the food web? A) Look for floating plants, such as water lilies. B) Look for tiny phytoplankton that float on the ocean surface. C) Look for small animal plankton near the ocean surface. D) Look for plants or animals that live along the ocean floor. Show Answer Correct Answer: B) Look for tiny phytoplankton that float on the ocean surface. 24. Over a period of fifty years, the population of a city doubled. As a result, many new homes and shopping centers were built, and there are more cars, landfills, and sewage treatment plants. What is most likely the effect on the local environment? A) Reduction in animal habitats and in air quality. B) Increased smog and nonnative species. C) Decreased soil erosion and greenhouse gas production. D) Improved water quality and cooler temperatures. Show Answer Correct Answer: A) Reduction in animal habitats and in air quality. 25. How does a mutation in a cell's DNA potentially lead to cancer? A) By causing the cell to die immediately. B) By disrupting the normal cell cycle and leading to uncontrolled cell growth. C) By making the cell immune to viruses. D) By enhancing the cell's normal functions. Show Answer Correct Answer: B) By disrupting the normal cell cycle and leading to uncontrolled cell growth. 26. First level of Organization A) Organs. B) Organism. C) Organ System. D) Tissues. E) Cells. Show Answer Correct Answer: E) Cells. 27. The number of different species in the biosphere, or in a particular area A) Biosphere diversity. B) Ecosystem Diversity. C) Species Diversity. D) Genetic Diversity. Show Answer Correct Answer: C) Species Diversity. 28. Living things in an ecosystem. Includes plants, animals, and micro-organisms. A) Biotic. B) Population. C) Antibiotic. D) Abiotic. Show Answer Correct Answer: A) Biotic. 29. The conifers are A) Ferns. B) Angiosperms. C) Non-seed plants. D) Gymnosperms. Show Answer Correct Answer: D) Gymnosperms. 30. Tempat hidup yang spesifik dari setiap makhluk hidup disebut ..... A) Habitat. B) Rumah tinggal. C) Wilayah. D) Ekosistem. Show Answer Correct Answer: A) Habitat. 31. In a pond ecosystem diatoms are A) Primary consumers. B) Producers. C) Decomposers. D) Secondary consumers. Show Answer Correct Answer: B) Producers. 32. The lowest amount of an environmental factor that an organism can tolerate: A) Invasive Species. B) Upper Limit. C) Lower Limit. D) Range of Tolerance. Show Answer Correct Answer: C) Lower Limit. 33. Which group uses the sun's energy to make food? A) Consumers. B) Predators. C) Producers. D) Decomposers. Show Answer Correct Answer: C) Producers. 34. What does the term "terrestrial" mean? A) Water-based ecosystem. B) Land-based ecosystem. C) All the above. D) None of the above. Show Answer Correct Answer: B) Land-based ecosystem. 35. In an experiment, the variable we measure is called the A) Dependent variable. B) Control variable. C) Hidden variable. D) Independent variable. Show Answer Correct Answer: A) Dependent variable. 36. What is the role of lignotubers in some Australian plants? A) To store water during drought. B) To attract pollinators with bright colors. C) To produce flowers above ground. D) To send up new shoots after fire. Show Answer Correct Answer: D) To send up new shoots after fire. 37. What is the impact of habitat destruction on species diversity? A) Habitat destruction leads to an increase in species diversity. B) Habitat destruction has no impact on species diversity. C) Habitat destruction leads to a decline in species diversity and can result in extinction. D) Habitat destruction only affects plant species, not animals. Show Answer Correct Answer: C) Habitat destruction leads to a decline in species diversity and can result in extinction. 38. An autotroph is also called a ..... A) Consumer. B) Decomposer. C) Heterotroph. D) Producer. Show Answer Correct Answer: D) Producer. 39. What role did Linnaeus play in classification of organisms? A) He classified all life into plants and animals. B) He classified all life by where organisms lived. C) He started naming organisms using binomial nomenclature. D) He utilized DNA technology to form the modern system of naming. Show Answer Correct Answer: C) He started naming organisms using binomial nomenclature. 40. What term describes the ability of an organism or ecosystem to adapt after a disturbance? A) Resilience. B) Niche. C) Tolerance. D) Biodiversity. Show Answer Correct Answer: A) Resilience. 41. Which introduced species is mentioned as having been unsuccessful as a biological control? A) Cane toads. B) Beetles in sugarcane crops. C) Prickly pear. D) Cactoblastus caterpillars. Show Answer Correct Answer: A) Cane toads. 42. In order for two species within the same area to coexist, they may adapt by developing different specializations. This is known as ..... A) Character enhancement. B) Character displacement. C) Character development. D) Character narrowing. Show Answer Correct Answer: B) Character displacement. 43. What type of interdependence is exhibited by Rhizobium? A) Predation. B) Decomposition. C) Symbiosis. D) Parasitism. Show Answer Correct Answer: C) Symbiosis. 44. Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers where the larvae hatch and eat some of the developing seeds. Both species benefit. A) Mutualism. B) Parasitism. C) Commensalism. D) None of the above. Show Answer Correct Answer: A) Mutualism. 45. The carrying capacity for a population of lizards is 2700. If the current population is 1340 and the r$_{max }$for the population was found to be 0.83, what would the population size be after 1 year? A) 1825. B) 2100. C) 2356. D) 1900. Show Answer Correct Answer: D) 1900. 46. Di bawah ini yang menunjukkan rantai makanan yang benar adalah ..... A) Tumbuhan $\rightarrow$ ayam $\rightarrow$ serangga $\rightarrow$ kelinci $\rightarrow$ pengurai. B) Tumbuhan $\rightarrow$ tikus $\rightarrow$ ular $\rightarrow$ elang $\rightarrow$ pengurai. C) Belalang $\rightarrow$ tumbuhan $\rightarrow$ kadal $\rightarrow$ ular $\rightarrow$ harimau. D) Pengurai $\rightarrow$ tumbuhan $\rightarrow$ kadal $\rightarrow$ belalang $\rightarrow$ ular. Show Answer Correct Answer: B) Tumbuhan $\rightarrow$ tikus $\rightarrow$ ular $\rightarrow$ elang $\rightarrow$ pengurai. 47. For a food chain A B C D, If there are 50, 000KJ of E available in A, how much of that energy will be available for D? A) 5000. B) 5. C) 50. D) 500. Show Answer Correct Answer: C) 50. 48. What do the arrows in a food chain represent? A) The direction of energy flow. B) The availability of food. C) The predators in the ecosystem. D) The distribution of organisms. Show Answer Correct Answer: A) The direction of energy flow. 49. What is the main focus of Module 4 in Year 11 Biology? A) Cellular Biology. B) Ecosystem Dynamics. C) Human Anatomy. D) Genetics. Show Answer Correct Answer: B) Ecosystem Dynamics. 50. Sustainable development A) Ignoring the needs of future generations for current benefits. B) Using resources in a way that depletes them for future use. C) Using natural resources in ways that meet human needs now without harming future generations. D) Exploiting natural resources for immediate economic gain. Show Answer Correct Answer: C) Using natural resources in ways that meet human needs now without harming future generations. 51. What is the role of plants in a food chain? A) They produce energy for the ecosystem. B) They are secondary consumers. C) They are primary consumers. D) They decompose nutrients. Show Answer Correct Answer: A) They produce energy for the ecosystem. 52. Which family does the Waratah belong to? A) Eucalyptus. B) Proteacea. C) Murtacea. D) Acacia. Show Answer Correct Answer: B) Proteacea. 53. What do you call an organism that must consume other organisms for food? A) Producer. B) Heterotroph. C) Phytoplankton. D) Autotroph. Show Answer Correct Answer: B) Heterotroph. 54. Which of the following is a threat to ecosystem services? A) Biodiversity conservation. B) Sustainable development. C) Habitat destruction. D) Climate change. Show Answer Correct Answer: C) Habitat destruction. 55. What do you call a group of organisms of the same species, who live in the same area at the same time? A) Ecosystem. B) Population. C) Community. D) Species. Show Answer Correct Answer: B) Population. 56. Which of these organisms would most likely be found at the top of an energy pyramid? A) Sharks-a secondary consumer. B) Kelp-a primary producer. C) Sardines-a primary consumer. D) Clams-a primary consumer. Show Answer Correct Answer: A) Sharks-a secondary consumer. 57. The jelly-like substance that fills the cell. A) Nucleus. B) Cell wall. C) Cytoplasm. D) Chloroplasts. Show Answer Correct Answer: C) Cytoplasm. 58. What term describes all nonliving factors in an environment? A) Zoological. B) Biotic. C) Abiotic. D) Biological. Show Answer Correct Answer: C) Abiotic. 59. How do predators affect prey populations? A) Predators help control prey populations, preventing overpopulation and resource depletion. B) Predators increase the number of prey by providing food sources. C) Predators have no significant impact on prey populations. D) Predators only affect the size of the prey's habitat. Show Answer Correct Answer: A) Predators help control prey populations, preventing overpopulation and resource depletion. 60. As ecosystems move through the stages of succession, the populations of organisms in them change. Which of the following describes the stage of succession likely to have the most species diversity? A) A newly formed volcanic island. B) An agricultural field that has not been plowed for one year. C) A temperate forest that has never been cleared by logging. D) A field that is regularly mowed. Show Answer Correct Answer: C) A temperate forest that has never been cleared by logging. ← 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