This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 15 Biodiversity And Conservation – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. According to Robert May, the global species diversity is estimated to be about ..... million. A) 7. B) 3. C) 15. D) 25. Show Answer Correct Answer: A) 7. 2. True or False:Trees are important to humans because they help reduce CO$_{2}$ in the atmosphere. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. Reintroducing the gray wolf in certain areas of the northwestern United States A) Is beneficial for all of those working in that area. B) Creates a mutualist interaction between wolves and elks. C) Is in accordance with the U.S. Endangered Species Act of 1973. D) Discourages hunters from hunting other animals. Show Answer Correct Answer: C) Is in accordance with the U.S. Endangered Species Act of 1973. 4. What do we call plants that will grow back year after year without being replanted? A) Hybrids. B) Perennials. C) Wild. D) None of the above. Show Answer Correct Answer: B) Perennials. 5. What biome contains the least amount of species biodiversity? A) Desert. B) Tundra. C) Tropical Rainforest. D) Ocean. Show Answer Correct Answer: B) Tundra. 6. An organism that has an usually large effect on an ecosystem is called a(n) A) Keystone species. B) Omnivore. C) Biotic factor. D) Heterotroph. Show Answer Correct Answer: A) Keystone species. 7. The number of fungi species in the world is more than the combined total of the species of fishes, amphibians, reptiles and mammals. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. Environmental factors do affect genetic diversity A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. What does ecosystem diversity refer to? A) The variety of genes within a particular species. B) The differences in physical appearance among individuals of a species. C) The variety of habitats, natural communities, and ecological processes in the environment. D) The number of species within a specific habitat. Show Answer Correct Answer: C) The variety of habitats, natural communities, and ecological processes in the environment. 10. Which of the following forests is known as the lungs of the planet Earth? A) Tiaga forest. B) Tundra forest. C) Amazon rain forest. D) Rain forests of North East India. Show Answer Correct Answer: C) Amazon rain forest. 11. Within the phylum Chordata, which of the following describe that class that have hair on part of their body, and mammary glands that produce milk? A) Agnatha. B) Reptilia. C) Mammalia. D) Aves. Show Answer Correct Answer: C) Mammalia. 12. Diversity of genes within species is known as A) Species diversity. B) Genetic diversity. C) Ecosystem diversity. D) None of these. Show Answer Correct Answer: B) Genetic diversity. 13. The prevention of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization, or other chemical soil contamination. A) ECOLOGICAL LIFE SUPPORT. B) WILDLIFE CONSERVATION. C) WATER CONSERVATION. D) SOIL CONSERVATION. Show Answer Correct Answer: D) SOIL CONSERVATION. 14. Sulfur and nitrogen compounds react with water andother substances in the air to form sulfuric acid andnitric acid. A) Biological Magnification. B) Acid precipitation. C) Eutrophication. D) Invasive (introduced) species. E) Pollution. Show Answer Correct Answer: B) Acid precipitation. 15. Resources that are found on Earth in limited amounts A) Nonrenewable resources. B) Renewable resources. C) Sustainable use. D) Endemic. Show Answer Correct Answer: A) Nonrenewable resources. 16. A non-native species transported to a new habitat A) Bioremediation. B) Introduced species. C) Endemic. D) Eutrophication. Show Answer Correct Answer: B) Introduced species. 17. High biodiversity allows individual organisms to modify their body parts to adapt and survive in the environment. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 18. All of the following describe habitat fragmentation, EXCEPT: A) Gaps form within a habitat. B) Patches of suitable habitat are surrounded by unsuitable habitat. C) Often a result of habitat loss. D) Increases the number of species. Show Answer Correct Answer: D) Increases the number of species. 19. Which is the most endangered animal group? A) Mammals. B) Amphibians. C) Insects. D) Birds. Show Answer Correct Answer: B) Amphibians. 20. The number of different species and the relative abundance of each species in a biological community A) Biological magnification. B) Ecosystem diversity. C) Species diversity. D) Genetic diversity. Show Answer Correct Answer: C) Species diversity. 21. Deserts. rain forests. mangroves. coral reefs, wetlands, estuaries and alpine meadows can be employed to describe A) Genetic diversity. B) Species diversity. C) Ecological diversity. D) All of the above. Show Answer Correct Answer: C) Ecological diversity. 22. What is a measure of how all of the individual organisms in an ecosystem are balanced between the different species? A) Species richness. B) Species evenness. C) Shannon weiner index. D) Genetic diversity. Show Answer Correct Answer: B) Species evenness. 23. What is the number one cause of species extinction today? A) Habitat loss. B) Human predators. C) Transported diseases. D) Background extermination. Show Answer Correct Answer: A) Habitat loss. 24. Which is a consequence of introducing high-yielding foreign plant varieties? A) Increase in native species. B) Soil pollution. C) Annihilation of local varieties. D) Water conservation. Show Answer Correct Answer: C) Annihilation of local varieties. 25. Species diversity ..... as one moves from equator to pole. A) Increases. B) Decreases. C) First increases then decreases. D) First decreases then increases. Show Answer Correct Answer: B) Decreases. ← 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 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books