This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 15 Biodiversity And Conservation – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. During the long period ( > 3 billion years) since theorigin and diversification of life on earth there arehow many episodes of mass extinction of species? A) 6. B) 4. C) 7. D) 5. Show Answer Correct Answer: A) 6. 2. Humans are not affected by the biodiversity of ecosystems. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 3. In which year, the conservation of biodiversity was signed at the earth summit held at Rio de Jeneiro, Brazil? A) 1960. B) 1940. C) 1992. D) 1948. Show Answer Correct Answer: C) 1992. 4. What does "sustainable use" of natural resources mean? A) Using resources at a rate where they can be replaced or recycled. B) Using resources as quickly as possible. C) Using resources without any regulations. D) Not using any resources to preserve them. Show Answer Correct Answer: A) Using resources at a rate where they can be replaced or recycled. 5. Material or organism found in the biosphere A) Natural resource. B) Eutrophication. C) Overexploitation. D) Edge effect. Show Answer Correct Answer: A) Natural resource. 6. What do we call species that are at serious risk of extinction? A) Fragmented. B) Endangered. C) Extinct. D) None of the above. Show Answer Correct Answer: B) Endangered. 7. Amongst vertebrates, which among the following demonstrate most species diversity globally? A) Fishes. B) Reptiles. C) Birds. D) Amphibians. Show Answer Correct Answer: A) Fishes. 8. According to IUCN Red list, during the last two decades the maximum increase in the number of threatened species is among A) Birds. B) Mammals. C) Amphibians. D) Reptiles. Show Answer Correct Answer: C) Amphibians. 9. What are the consequences of eutrophication? A) Improved water clarity. B) Decreased plant growth. C) Increased fish population. D) Harmful algal blooms and dead zones. Show Answer Correct Answer: D) Harmful algal blooms and dead zones. 10. Which species is known to protect other species as well? A) An invasive species. B) An introduced species. C) A sustainable species. D) An umbrella species. Show Answer Correct Answer: D) An umbrella species. 11. What is meant by over-exploitation? A) Planting native species. B) Water conservation. C) Excessive use of natural resources. D) Recycling of resources. Show Answer Correct Answer: C) Excessive use of natural resources. 12. Variety of inheritable characteristics or genes in an interbreeding population. A) Genetic Diversity. B) Species Diversity. C) Ecosystem Diversity. D) None of the above. Show Answer Correct Answer: A) Genetic Diversity. 13. Biodiversity means all the organisms are ..... A) The same. B) Different. C) Invasive. D) Endangered. Show Answer Correct Answer: B) Different. 14. Maximum species diversity is seen in latitudinal range of A) 66.5$^\circ$N to 90$^\circ$N. B) 23.5$^\circ$S to 66.5$^\circ$N. C) 23.5 $^\circ$N to 66.5$^\circ$N. D) 23.5$^\circ$N to 23.5$^\circ$S. Show Answer Correct Answer: D) 23.5$^\circ$N to 23.5$^\circ$S. 15. Which of the following is an example of an ecosystem service? A) Introduction of invasive species. B) Overfishing. C) Pollination of crops by bees. D) Deforestation. Show Answer Correct Answer: C) Pollination of crops by bees. 16. Which of the following options are one of the examples of sacred groves in our country? A) Khasi and Jaintia hills in Meghalaya. B) Botanical gardens. C) Zoological parks. D) Wild life safari parks. Show Answer Correct Answer: A) Khasi and Jaintia hills in Meghalaya. 17. Species that are clearly critical to the functioning of an ecosystem are known as A) Keystone species. B) Biodiversity. C) Native species. D) Main species. Show Answer Correct Answer: A) Keystone species. 18. Which applies to this environmental problem:As more people are added to the Earth, more resources are required to meet their needs. A) Habitat Loss. B) Invasive Species. C) Pollution. D) Population Growth. E) Over-exploitation. Show Answer Correct Answer: D) Population Growth. 19. Species native to a particular area A) Endemic species. B) Ecotourism. C) Keystone species. D) Poaching. Show Answer Correct Answer: A) Endemic species. 20. Excessive use of a species, often leading to extinction A) Natural resource. B) Biological magnification. C) Mass extinction. D) Overexploitation. Show Answer Correct Answer: D) Overexploitation. 21. In the analogy used by ecologist Paul Ehrlich, rivets are compared to ..... and airplane to ..... A) Rivets to nature and airplane to animals. B) Rivets to species and airplane to ecosystem. C) Rivets to play tools and airplane to play station for passengers. D) None of the above. Show Answer Correct Answer: B) Rivets to species and airplane to ecosystem. 22. High biodiversity makes it more likely that the ecosystem will be able to keep functioning after a disturbance, such as disease or natural disaster. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Changes in the composition of air, soil, and water A) Destruction of habitat. B) Disruption of habitat. C) Acid precipitation. D) Pollution of habitat. Show Answer Correct Answer: D) Pollution of habitat. 24. Which of the following is an example of poaching for ornamental purposes? A) Relocating animals. B) Hunting for meat. C) Killing animals to protect crops. D) Collecting animal skin or ivory. Show Answer Correct Answer: D) Collecting animal skin or ivory. 25. When nations ratify a (a), they promise to uphold the laws that are described. A) A. treaty. B) Biodiversity. C) Environment. D) Biome. E) Species. Show Answer Correct Answer: A) A. treaty. 26. Tragedy of the commons is the result of regulated and managed access to natural resources. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 27. What is the pH of normal rain? A) 5.6. B) 4.9. C) 7.0. D) 4.1. Show Answer Correct Answer: A) 5.6. 28. Any resource replaced by natural processes more quickly than it is consumed is a: A) Natural Resource. B) Endemic Resource. C) Nonrenewable Resource. D) Renewable Resource. Show Answer Correct Answer: D) Renewable Resource. 29. Based on current data about species population trends, some scientists claim we are in the middle of Earth's sixth ..... A) Endemic. B) Treaty. C) Biodiversity. D) Mass extinction. Show Answer Correct Answer: D) Mass extinction. 30. Fill in the blank:Since life originated on earth nearly ..... billion years ago, there had been enormous diversification of life forms on earth. A) 4.6. B) 2.5. C) 3.8. D) 1.2. Show Answer Correct Answer: C) 3.8. 31. The level of biodiversity that involves a variety of habits and communities is A) Genetic diversity. B) Population diversity. C) Ecosystem diversity. D) Species diversity. Show Answer Correct Answer: C) Ecosystem diversity. 32. Which of the following statements are true about latitudinal gradient? A) Species diversity decreases as we move away from the equator towards poles. B) Species diversity is more in temperate latitude, than, other latitudes. C) Species diversity is more in poles than in equator. D) None of the above. Show Answer Correct Answer: A) Species diversity decreases as we move away from the equator towards poles. 33. What is considered to be a form of ecotourism? A) Going for a walk in the neighborhood. B) Going on a safari tour in the deserts of Africa. C) Bird watching at your house. D) Staying home. Show Answer Correct Answer: B) Going on a safari tour in the deserts of Africa. 34. Which of the following represents single-species approaches to protecting biodiversity? A) Building of wildlife corridors. B) Selling conservation concessions. C) Captive breeding and cloning. D) Mapping biodiversity hotspots. Show Answer Correct Answer: C) Captive breeding and cloning. 35. Locomotory structures in protists are- A) Flagella. B) Cilia. C) Pseudopodia. D) All. Show Answer Correct Answer: D) All. 36. A species that is likely to become extinct if protective measures are not taken immediately is known as A) Endemic species. B) Endangered species. C) Threatened species. D) Keystone species. Show Answer Correct Answer: B) Endangered species. 37. What is a natural event that disrupts the structure and or function of an ecosystem? A) Range of tolerance. B) Natural disruption. C) Anthropogenic disruption. D) Urbanization. Show Answer Correct Answer: B) Natural disruption. 38. How is the current decline in biodiversity different from the previous mass extinctions that Earth has experienced? A) It is happening much more slowly. B) This time it is not really happening. C) It is made worse by an asteroid hitting Earth. D) This is being caused by humans. Show Answer Correct Answer: D) This is being caused by humans. 39. What attracts wild carnivores like tigers and wolves to human settlements? A) Forest fires. B) Domestic livestock. C) Fertile soil. D) Tall buildings. Show Answer Correct Answer: B) Domestic livestock. 40. A solution to habitat fragmentation is A) Building ecosystem ladders. B) Building more zoos. C) Building more islands. D) Building wildlife corridors. Show Answer Correct Answer: D) Building wildlife corridors. 41. Which of the following is a method used to maintain and protect biodiversity? A) Establishing protected areas. B) Urbanization. C) Industrialization. D) Deforestation. Show Answer Correct Answer: A) Establishing protected areas. 42. What is the purpose of conservation strategies? A) To enhance the exploitation of natural resources. B) To promote urban development over natural habitats. C) The purpose of conservation strategies is to protect biodiversity and ecosystems. D) To increase pollution levels in ecosystems. Show Answer Correct Answer: C) The purpose of conservation strategies is to protect biodiversity and ecosystems. 43. What are the 3 types of biodiversity? A) Genetic, Species, Ecosystem. B) Agriculture, pharmaceutical, deforestation. C) Genetic, forest, aquatic. D) Biology, chemistry, geography. Show Answer Correct Answer: A) Genetic, Species, Ecosystem. 44. Which of the following is NOT a way in which humans are destroying habitats? A) Gathering rain water to use to water crops. B) Clearing out prairies to grow a single crop. C) Cutting trees to use as toilet paper. D) Building a shopping mall with a large parking lot. Show Answer Correct Answer: A) Gathering rain water to use to water crops. 45. What is illegal hunting A) Poaching. B) Genetic biodiversity. C) Ecotourism. D) Captive breeding. Show Answer Correct Answer: A) Poaching. 46. The extinction of passenger pigeon was due to A) Non-availability of the food. B) Increased number of predatory birds. C) Over exploitation by humans. D) Bird flu virus infection. Show Answer Correct Answer: C) Over exploitation by humans. 47. When there is absolutely no individuals left from a specific type of species, we consider them to be? A) Threatened. B) Endangered. C) Extinct. D) Great at playing hide and seek:0. Show Answer Correct Answer: C) Extinct. 48. What is the definition of extinction? A) The recovery of a species. B) The introduction of new species. C) The increase of a species population. D) The permanent loss of a species from the Earth. Show Answer Correct Answer: D) The permanent loss of a species from the Earth. 49. Critically assess the role of international agreements in biodiversity conservation. Provide examples of such agreements. A) International agreements have no role in biodiversity conservation. B) International agreements are crucial as they set global standards and goals, such as the Convention on Biological Diversity. C) International agreements only focus on economic development. D) International agreements are only effective in developed countries. Show Answer Correct Answer: B) International agreements are crucial as they set global standards and goals, such as the Convention on Biological Diversity. 50. Where do the convection currents that cause the movement of crustal plates occur? A) In the mantle. B) In the inner core. C) In the outer core. D) In the crust. Show Answer Correct Answer: A) In the mantle. 51. What is the ability of an ecosystem to return to its original conditions after a major disturbance? A) Resilience. B) Inbreeding. C) Bottleneck event. D) Wildlife corridor. Show Answer Correct Answer: A) Resilience. 52. What is the primary focus of the CBC's program in Vietnam? A) Conservation science training and wildlife trade management. B) Urban planning. C) Tourism development. D) Industrial training. Show Answer Correct Answer: A) Conservation science training and wildlife trade management. 53. Variety of habitats, ecosystems, communities refers to what? A) Ecosystem diversity. B) Species diversity. C) Genetic Diversity. D) None of the above. Show Answer Correct Answer: A) Ecosystem diversity. 54. ..... ecosystem are resistant and resilient. A) Stable. B) Unstable. C) All the above. D) None of the above. Show Answer Correct Answer: A) Stable. 55. What is the impact of climate change on biodiversity? A) Climate change only affects human populations, not wildlife. B) Climate change enhances biodiversity by creating new habitats. C) Climate change has no effect on biodiversity. D) Climate change negatively impacts biodiversity by causing habitat loss, increased extinction rates, and altered ecosystems. Show Answer Correct Answer: D) Climate change negatively impacts biodiversity by causing habitat loss, increased extinction rates, and altered ecosystems. 56. Among various categories of threatened species the percentage of angiosperms categorised as vulnerable is about A) 14%. B) 19%. C) 51%. D) 41%. Show Answer Correct Answer: C) 51%. 57. Adding natural predators to an ecosystem A) Bioremediation. B) Biological augmentation. C) Biological magnification. D) Eutrophication. Show Answer Correct Answer: B) Biological augmentation. 58. Heterocystous cyanobacteria- A) Only Nostoc. B) Only Anabaena. C) Both Nostoc and Anabaena. D) Vibrio. Show Answer Correct Answer: C) Both Nostoc and Anabaena. 59. What type of pollution causes acid rain? A) Urban noise. B) Organic farming. C) Burning of fossil fuels. D) Nuclear radiation. Show Answer Correct Answer: C) Burning of fossil fuels. 60. A species that is not native to a particular region A) Extinct. B) Exotic. C) Endemic. D) Endangered. Show Answer Correct Answer: B) Exotic. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Biology Chapter 15 Biodiversity And Conservation Quiz 1Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 2Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 3Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 4Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 6Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 7Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 8Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books