This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 15 Biodiversity And Conservation – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Renewable & Nonrenewable resources are two classes of what??? A) Habitat loss. B) Fragmentation. C) Natural resources. D) Biodiversity. Show Answer Correct Answer: C) Natural resources. 2. As biodiversity decreases, the sustainability of an ecosystem ..... A) Increases. B) Decreases. C) Stays the same. D) All of these are correct. Show Answer Correct Answer: B) Decreases. 3. This is the extinction of a species one by one, not a sudden loss of many species A) Fragmentation. B) Mass extinction. C) Background extinction. D) Biotic potential. Show Answer Correct Answer: C) Background extinction. 4. Which of the following is true about nonrenewable resources? A) There are plenty for people to use for a very long time. B) They can be replaced through sustainable development. C) They cannot be replaced after they are used up. D) Using them up will help keep the environment healthy. Show Answer Correct Answer: C) They cannot be replaced after they are used up. 5. Which of the following is a climate change-related threat to biodiversity? A) Poaching. B) Logging. C) Urbanization. D) Melting Arctic sea ice. Show Answer Correct Answer: D) Melting Arctic sea ice. 6. What are biotic elements? A) Nonliving things in an ecosystem. B) Living things in an ecosystem. C) All the above. D) None of the above. Show Answer Correct Answer: B) Living things in an ecosystem. 7. Based upon the modes of nutrition, protists are grouped into- A) Plant-like protists (algae) and ingestive, animal-like protists (protozoa); and absorptive, fungus like protists. B) Chrysophytes, Dinoflagellates and Euglenoids only. C) Slime moulds and fungi only. D) Flagellated protozoans and sporozoans only. Show Answer Correct Answer: A) Plant-like protists (algae) and ingestive, animal-like protists (protozoa); and absorptive, fungus like protists. 8. True or False:Human beings are wiping out species much faster than nature creates them, causing what scientists call a "6th extinction" A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. What is the location where two ecosystems meet and have different characteristics than the middle of each ecosystem? A) Edge habitat. B) Habitat intersection. C) Biome border. D) Ecosystem junction. Show Answer Correct Answer: A) Edge habitat. 10. Why is the Svalbard Seed Bank important? A) Storing ancient artifacts. B) Protecting endangered animal species. C) Preserving plant seeds for future generations. D) Creating new hybrid plant species. Show Answer Correct Answer: C) Preserving plant seeds for future generations. 11. Why is biodiversity important? A) It supports ecosystem services and cultural values. B) Only for aesthetic purposes. C) It is not important. D) Only for economic growth. Show Answer Correct Answer: A) It supports ecosystem services and cultural values. 12. Which process describes the gradual increase in concentration of harmful substances in organisms at higher trophic levels? A) Endemism. B) Background Extinction. C) Biological Magnification. D) Eutrophication. Show Answer Correct Answer: C) Biological Magnification. 13. The variety of different types of genes in a species or population A) Genetic variation. B) Speciation. C) Artificial selection. D) Evolution. Show Answer Correct Answer: A) Genetic variation. 14. This occurs on land that has underwent some damage, like a forest fire. A) Secondary succession. B) Poaching. C) Primary succession. D) Habitat fragmentation. Show Answer Correct Answer: A) Secondary succession. 15. The separation of an ecosystem into small pieces of land is called: A) Edge effect. B) Habitat effect. C) Edge fragmentation. D) Habitat fragmentation. Show Answer Correct Answer: D) Habitat fragmentation. 16. At serious risk of extinction A) Endangered. B) Threatened. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endangered. 17. What percentage of the total oxygen in the earth's atmosphere is estimated to be produced by the dwindling Amazon forest through photosynthesis? A) 5 percent. B) 50 percent. C) 20 percent. D) 35 percent. Show Answer Correct Answer: C) 20 percent. 18. When NO members of a species are left, this is an example of ..... A) Protected. B) Endangered. C) Extinction. D) Threatened. Show Answer Correct Answer: C) Extinction. 19. Which is NOT one of the three main goals of Species Survival Plans? A) Reintroduce species. B) Clone species. C) Protect species. D) Manage species. Show Answer Correct Answer: B) Clone species. 20. According to Robert May, the global species diversity is about A) 20 million. B) 1.5 million. C) 50 million. D) 7 million. Show Answer Correct Answer: D) 7 million. 21. The impacts of loss of biodiversity include-A. Decrease in plant production.B. Lowered resistance to environmental perturbationC. Increased variability in ecosystem processes like water use, pest / disease cycle, plants productivity.D. None A) D. B) B, C. C) A, B. D) A, B, C. Show Answer Correct Answer: D) A, B, C. 22. Ideally, sustainable development should A) Use more natural resources to make goods to meet human needs. B) Preserve ecosystems while providing for human needs. C) Put the protection of the environment ahead of human needs. D) Provide for human needs at the expense of the environment. Show Answer Correct Answer: B) Preserve ecosystems while providing for human needs. 23. Protecting and preserving natural resources and the environment A) Conservation. B) Endemic. C) Native. D) Resilience. Show Answer Correct Answer: A) Conservation. 24. How can reforestation benefit ecosystems? A) By increasing the number of invasive species. B) By reducing biodiversity. C) By restoring habitats and increasing carbon sequestration. D) By causing soil erosion. Show Answer Correct Answer: C) By restoring habitats and increasing carbon sequestration. 25. Most species-rich taxonomic group among animals comprises A) No more than 50% of total diversity. B) More than 80% of total diversity. C) More than 70% of total diversity. D) No more than 60% of total diversity. Show Answer Correct Answer: C) More than 70% of total diversity. 26. What is by-catch? A) The intentional capture of target fish species. B) The extinction of a species due to overfishing. C) The unintentional capture of non-target species during fishing. D) The process of replanting trees in a deforested area. Show Answer Correct Answer: C) The unintentional capture of non-target species during fishing. 27. Evidence that supports the theory of continental drift has been provided by A) Changes in the rotation of Earth. B) Similar fossils found in South America and Africa. C) The presence of mineral deposits in Southern Africa. D) The direction of flow of the ocean currents. Show Answer Correct Answer: B) Similar fossils found in South America and Africa. 28. In which location would you expect to find the greatest species diversity? A) Maine. B) Iowa. C) Minnesota. D) Jamaica. Show Answer Correct Answer: D) Jamaica. 29. Fill in the blank:The Amazon rain forest is so huge that it is called the ' ..... of the planet'. A) Engine. B) Heart. C) Lungs. D) Roof. Show Answer Correct Answer: C) Lungs. 30. This type of diversity refers to all the different genes contained within all members of a population. A) Ecosystem Diversity. B) Community Diversity. C) Species Diversity. D) Genetic Diversity. Show Answer Correct Answer: D) Genetic Diversity. 31. What is it called when organisms that are better adapted to their environment survive and reproduce more offspring? A) Unnatural selection. B) Artificial selection. C) Natural selection. D) Random selection. Show Answer Correct Answer: C) Natural selection. 32. ILLEGAL killing of animals, usually for one or two parts of its body A) Hunting. B) Invasive species. C) Poaching. D) Overharvest. Show Answer Correct Answer: C) Poaching. 33. Which region in India has a greater amphibian species diversity? A) Western Ghats. B) Eastern Ghats. C) Himalayan ranges. D) Scandinavian countries. Show Answer Correct Answer: A) Western Ghats. 34. What is the importance of genetic diversity? A) Genetic diversity is important because it increases the resilience, adaptability, and survival of species. B) Genetic diversity is not relevant to the survival of species. C) Genetic diversity reduces the adaptability of organisms. D) Genetic diversity causes increased competition among species. Show Answer Correct Answer: A) Genetic diversity is important because it increases the resilience, adaptability, and survival of species. 35. What is the impact of habitat destruction? A) It promotes biodiversity. B) It helps species thrive. C) It causes many animals and plants to lose their homes. D) It has no effect on ecosystems. Show Answer Correct Answer: C) It causes many animals and plants to lose their homes. 36. Which is NOT one of the five major causes of biodiversity loss. A) Habitat alteration/loss. B) Cloning. C) Overharvesting. D) Invasive species. Show Answer Correct Answer: B) Cloning. 37. What is considered the number one cause of extinction? A) Pollution. B) Habitat loss. C) Global warming. D) Fragmentation. Show Answer Correct Answer: B) Habitat loss. 38. Greater biological diversity of tropics than temperate regions is due to the A) Presence of more seasonal environment. B) Frequent glaciations in the past. C) Highly variable climate and availability of less solar energy in the past. D) Availability of more solar energy which contributes to higher productivity. Show Answer Correct Answer: D) Availability of more solar energy which contributes to higher productivity. 39. The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) and the Convention on Biological Diversity are examples of A) Agreements to promote wildlife tourism. B) Initiatives to ban all hunting activities. C) Laws to increase the number of species. D) Treaties to protect biodiversity. Show Answer Correct Answer: D) Treaties to protect biodiversity. 40. The LESS genetically diverse a population is, the better it can respond to environmental stressors A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 41. The illegal capture or killing of an organism, often for money, is called ..... A) Poaching. B) Fragementation. C) Harvesting. D) Extinction. Show Answer Correct Answer: A) Poaching. 42. Which threat to biodiversity includes poaching? A) Invasive Species. B) Habitat Destruction. C) Climate Change. D) Overexploitation. Show Answer Correct Answer: D) Overexploitation. 43. Invasive species are harmful because they: A) Increase biodiversity. B) Replace fossil fuels. C) Reduce water pollution. D) Threaten endemic species. Show Answer Correct Answer: D) Threaten endemic species. 44. Use of resources at a rate that they can be replaced or recycled. A) Sustainable Use. B) Endemic. C) Bioremediation. D) None of the above. Show Answer Correct Answer: A) Sustainable Use. 45. Hotspots in biodiversity are area where maximum: A) Number of fauna are found. B) Number of flora are found. C) Natural resources are found. D) Diversity is found. Show Answer Correct Answer: D) Diversity is found. 46. Which of the following is a direct human activity that threatens biodiversity? A) Evolution. B) Photosynthesis. C) Natural selection. D) Pollution. Show Answer Correct Answer: D) Pollution. 47. Species diversity ..... as we move away from the equator towards the poles. A) First increases then decreases. B) First decreases then increases. C) Decreases. D) Increases. Show Answer Correct Answer: C) Decreases. 48. Which of the following describes genetic diversity? A) Diversity at the species level. B) Diversity at the ecosystem level. C) Diversity at the genetic level over its distributional range. D) Diversity in the number of species in a region. Show Answer Correct Answer: C) Diversity at the genetic level over its distributional range. 49. Spanish brown bear ..... A) Eats big animals. B) Spreads seeds from the fruit they eat. C) Lives in North Pole. D) Is the largest bird. Show Answer Correct Answer: B) Spreads seeds from the fruit they eat. 50. What are the five major causes of biodiversity loss? A) Habitat alteration, invasive species, pollution, over harvesting, climate change. B) Climate change, urban sprawl, invasive species, over population, pollution. C) Ocean acidification, invasive species, species extinction, over harvesting, climate change. D) Deforestation, climate change, farming, invasive species, pollution. Show Answer Correct Answer: A) Habitat alteration, invasive species, pollution, over harvesting, climate change. 51. At the international level, the United Nations has facilitated several treaties to promote biodiversity. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 52. Which is NOT a type of diversity? A) Functional. B) Species. C) Ecosystem. D) Genetic. E) Hydroponics. Show Answer Correct Answer: E) Hydroponics. 53. The 8 levels of classification, most broad to most specific. A) Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. B) Order, Kingdom, Species, Domain, Phylum, Family, Class, Genus. C) Domain, Genus, Family, Order, Class, Phylum, Kingdom, Species. D) Domain, Species, Kingdom, Genus, Phylum, Family, Class, Order. Show Answer Correct Answer: A) Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. 54. A species at risk, but not yet endangered A) Exotic. B) Endemic. C) Endangered. D) Threatened. Show Answer Correct Answer: D) Threatened. 55. Which of the following is referred as "Evil Quartet" withreference to loss of biodiversity? A) Species richness. extinctions. deforestation, erosion. B) Habitat loss and fragmentation, over-exploitation, alien species invasion, co-extinction. C) Overexploitation. grazing, decomposition. extinction. D) Habitat destruction. co-extinction. deforestation.species richness. Show Answer Correct Answer: B) Habitat loss and fragmentation, over-exploitation, alien species invasion, co-extinction. 56. Variety of ecosystems in the biosphere. A) Genetic Diversity. B) Species Diversity. C) Ecosystem Diversity. D) None of the above. Show Answer Correct Answer: C) Ecosystem Diversity. 57. What is reforestation? A) The natural decay of trees in a forest. B) The planting of trees in an area where the forest has been cut down. C) The removal of trees from a forested area. D) The introduction of invasive species to a forest. Show Answer Correct Answer: B) The planting of trees in an area where the forest has been cut down. 58. ..... are all materials and organisms found in the biosphere, including minerals, fossil fuels, plants, animals, soil, clean water, etc. A) Non-renewable resources. B) Natural resources. C) Renewable resources. D) Pollutants. Show Answer Correct Answer: B) Natural resources. 59. What are abiotic elements in an ecosystem? A) Nonliving things in an ecosystem. B) Living things in an ecosystem. C) All the above. D) None of the above. Show Answer Correct Answer: A) Nonliving things in an ecosystem. 60. List the domain and kingdom based upon the following characteristics:-Most are Multicellular, some Unicellular-Eukaryotic-Heterotrophic (no photosynthesis)-Decomposers-Cell walls made of chitin A) Domain:EukaryotaKingdom:Protista. B) Domain:Eukaryota Kingdom:Fungi. C) Domain:BacteriaKingdom:Eubacteria. D) Domain:BacteriaKingdom:Fungi. Show Answer Correct Answer: B) Domain:Eukaryota Kingdom:Fungi. ← 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 5Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 6Class 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