This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 15 Biodiversity And Conservation – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Alexander von humboldt described for the first time A) Law of limiting factor. B) Species area relationship. C) Population growth equation. D) Ecological biodiversity. Show Answer Correct Answer: B) Species area relationship. 2. Around 40% of freshwater fishes of which region have note been classified yet? A) North America. B) South America. C) Europe. D) Asia. Show Answer Correct Answer: B) South America. 3. Name the four major causes of biodiversity losses as described in the passage. A) Habitat loss and fragmentation, Over-exploitation, pollution, introduction of alien species. B) Climate change, volcanic eruptions, earthquakes, tsunamis. C) Deforestation, urbanization, industrialization, mining. D) Overgrazing, desertification, soil erosion, salinization. Show Answer Correct Answer: A) Habitat loss and fragmentation, Over-exploitation, pollution, introduction of alien species. 4. According to biologists, what percentage of species have become or are expected to become extinct between 1900 and 2100? A) 1 percent. B) 10 percent. C) 25 percent. D) 60 percent. Show Answer Correct Answer: C) 25 percent. 5. ..... ecosystems are affected by environmental change but can bounce back and regain function. A) Strong. B) Diverse. C) Resilient. D) None of the above. Show Answer Correct Answer: C) Resilient. 6. Which threat of biodiversity is the root cause of all other threats to biodiversity? A) Pollution. B) Invasive Species. C) Overexploitation. D) Population. Show Answer Correct Answer: D) Population. 7. When an animal becomes extinct, that means A) A species of animal are in danger in the wild. B) The population of a species of animal is declining. C) A species that has no living members left. D) A species that needs help to rebuild their numbers in the wild. Show Answer Correct Answer: C) A species that has no living members left. 8. What is the variety of genes present? A) Bidiversity. B) Species diversity. C) Extinction. D) Genetic diversity. Show Answer Correct Answer: D) Genetic diversity. 9. Increasing concentration of toxic substances in organisms as trophic levels increase A) Biological magnification. B) Eutrophication. C) Edge effect. D) Overexploitation. Show Answer Correct Answer: A) Biological magnification. 10. India has two hotspots North East Himalayas and Western Ghats which are rich in: A) Reptiles. B) Butterflies. C) Amphibians. D) Amphibians, reptiles, some mammals, butterflies and Flowering plants. Show Answer Correct Answer: D) Amphibians, reptiles, some mammals, butterflies and Flowering plants. 11. Variety of habitats and communities within ecosystems. A) Genetic biodiversity. B) Biodiversity. C) Biodiversity hotspots. D) Ecosystem diversity. Show Answer Correct Answer: D) Ecosystem diversity. 12. ..... is the basic unit of classification and a taxonomic rank A) Species. B) Genus. C) Kingdom. D) Phylum. Show Answer Correct Answer: A) Species. 13. The distribution of species diversity on earth may be best described as A) It is uniformly distributed. B) It is highest in tropics. C) It is highest in polar regions. D) It is highest in Southern hemisphere and lowest in Northern hemisphere. Show Answer Correct Answer: B) It is highest in tropics. 14. The hydroponics lab (like the one in the back of our classroom) is good because it prevents habitat destruction. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 15. What is a nature reserve? A) A nature reserve is a protected area for the conservation of wildlife and its habitat. B) A nature reserve is a commercial hunting area. C) A nature reserve is an amusement park for wildlife shows. D) A nature reserve is a zoo for pet animals. Show Answer Correct Answer: A) A nature reserve is a protected area for the conservation of wildlife and its habitat. 16. Explanations for how animals achieved greater diversification include: A) Evolutionary adaptations and environmental changes. B) Limited genetic variation. C) Lack of competition. D) Absence of natural selection. Show Answer Correct Answer: A) Evolutionary adaptations and environmental changes. 17. Which is an example of genetic diversity within a rain forest? A) Wide variety of beetle species. B) DNA of a single three-toed sloth. C) All of the genes found within the ecosystem. D) Many variations of jaguar spots. Show Answer Correct Answer: C) All of the genes found within the ecosystem. 18. Which of the following is a major threat to biodiversity caused by human activities? A) Natural disasters. B) Habitat destruction. C) Seasonal changes. D) Genetic mutations. Show Answer Correct Answer: B) Habitat destruction. 19. 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) 4. B) 5. C) 6. D) 7. Show Answer Correct Answer: C) 6. 20. 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. 21. In which year, the conservation of biodiversity was signed at the earth summit held at Rio de Jeneiro, Brazil? A) 1940. B) 1948. C) 1960. D) 1992. Show Answer Correct Answer: D) 1992. 22. What does "sustainable use" of natural resources mean? A) Using resources at a rate where they can be replaced or recycled. B) Using resources without any regulations. C) Not using any resources to preserve them. D) Using resources as quickly as possible. Show Answer Correct Answer: A) Using resources at a rate where they can be replaced or recycled. 23. Material or organism found in the biosphere A) Eutrophication. B) Natural resource. C) Edge effect. D) Overexploitation. Show Answer Correct Answer: B) Natural resource. 24. 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. 25. Amongst vertebrates, which among the following demonstrate most species diversity globally? A) Fishes. B) Amphibians. C) Reptiles. D) Birds. Show Answer Correct Answer: A) Fishes. ← PreviousNext →Related 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 7Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 8Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 9Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books