This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 15 Biodiversity And Conservation – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 15 (42 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When sea otters disappeared from the pacific coast of North America, sea urchin population increased which in turn caused the kelp bed to decrease making the ecosystem unstable. These types of species (example:otters) are crucial for the ecosystem balance? A) Flagship species. B) Keystone species. C) Cute species species. D) Endemic species. Show Answer Correct Answer: B) Keystone species. 2. The act to prevent extinction, recover imperiled plants and animals, and protect the ecosystems on which they depend upon is called ..... A) Congressional Bill 78655. B) Project Save. C) The Fossil Fuel Burning Act of 2000. D) The Endangered Species Act of 1973. Show Answer Correct Answer: D) The Endangered Species Act of 1973. 3. Cyanobacteria are- A) Only fresh water. B) Only marine. C) Only terrestrial. D) Aquatic and terrestrial. Show Answer Correct Answer: D) Aquatic and terrestrial. 4. Why are species on islands more vulnerable to extinction? A) They have access to more natural resources. B) They have more genetic diversity. C) They have fewer predators. D) They evolved without natural predators. Show Answer Correct Answer: D) They evolved without natural predators. 5. The current species extinction rates are estimated to be 100 to 1, 000 times faster than in pre-human times. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. High biodiversity makes the food web more complex and better able to support the most species, even if some populations decrease. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Which of these describes a species that has become extinct? A) Fewer members of the species are dying than being born. B) More members of the species are dying than being born. C) Very few members of a species are alive. D) All members of a species have died. Show Answer Correct Answer: D) All members of a species have died. 8. The differences in DNA among individuals within species and populations is called A) Biodiversity hotspot. B) Species diversity. C) Endemic. D) Genetic diversity. Show Answer Correct Answer: D) Genetic diversity. 9. David Tilman's long-term ecosystem experimentsusing outdoor plots showed that A) Lncreased diversity contributed to higher productivity. B) Lncreased diversity has unpredictable impact on productivity. C) Lncreased diversity has no impact on productivity. D) Lncreased diversity contributed to lower productivity. Show Answer Correct Answer: D) Lncreased diversity contributed to lower productivity. 10. The variety of different species in a biological community A) Species diversity. B) Ecosystem diversity. C) Genetic diversity. D) Extinction. Show Answer Correct Answer: A) Species diversity. 11. What is the difference in the genes of individuals within a population (group of the same species)? A) Ecosystem resilience. B) Ecosystem diversity. C) Species diversity. D) Genetic diversity. Show Answer Correct Answer: D) Genetic diversity. 12. Almost ..... of the world's species are found in 5 biodiversity hotspots. A) 20%. B) 80%. C) 100%. D) 50%. Show Answer Correct Answer: D) 50%. 13. It refers to the range of different inherited traits within a species and there would be many individuals with a wide variety of different traits. A) GENETIC DIVERSITY. B) SPECIES DIVERSITY. C) ECOLOGICAL DIVERSITY. D) BIODIVERSITY. Show Answer Correct Answer: A) GENETIC DIVERSITY. 14. In what part of the world are the greatest number of extinctions occurring? A) In tropical rain forests. B) In deserts. C) In the Arctic. D) In Europe and the United States. Show Answer Correct Answer: A) In tropical rain forests. 15. What do we call services provided by biodiversity? A) Natural resources. B) Ecosystem services. C) Habitat richness. D) None of the above. Show Answer Correct Answer: B) Ecosystem services. 16. Which of the following is an example of the economic benefit of preserving ecosystems? A) Finding a new crop in a remote region. B) New York City choosing to clean up its watersheds rather than building a filtration system. C) The discovery of penicillin in bread mold. D) Using a tropical forest as a tourist attraction. Show Answer Correct Answer: B) New York City choosing to clean up its watersheds rather than building a filtration system. 17. What is mean by in situ? A) Protection, upliftment and scientific management to biodiversity. B) The preservation of components of biological outside their natural habitats. C) The conservation of species in their natural habitats. D) None of the above. Show Answer Correct Answer: C) The conservation of species in their natural habitats. 18. What is bionics or biomimetics inspired by? A) Organisms in nature. B) Outer space. C) Artificial intelligence. D) Ancient civilizations. Show Answer Correct Answer: A) Organisms in nature. 19. What is the impact of the extinction of one species on an ecosystem? A) It leads to the growth of new species. B) It could have a 'domino' effect, resulting in the extinction of other species. C) It increases the biodiversity of the ecosystem. D) It has no impact on the ecosystem. Show Answer Correct Answer: B) It could have a 'domino' effect, resulting in the extinction of other species. 20. The region of biosphere reserve which is legally protected and where no human activity is allowed is known as A) Transition zone. B) Buffer zone. C) Restoration zone. D) Core zone. Show Answer Correct Answer: D) Core zone. 21. Threatened areas of high biodiversity. A) Endangered areas. B) Threatened areas. C) Biodiversity hotspots. D) Remote islands. Show Answer Correct Answer: C) Biodiversity hotspots. 22. Why is it important to protect endangered species? A) Biodiversity has no impact on human health. B) Protecting endangered species is important for biodiversity, ecosystem health, and economic benefits. C) Endangered species are not important for the environment. D) Protecting endangered species only benefits certain industries. Show Answer Correct Answer: B) Protecting endangered species is important for biodiversity, ecosystem health, and economic benefits. 23. A species that is not native to a particular region and has no natural predators and little competition A) Adapted species. B) Invasive species. C) Producer species. D) Consumer species. Show Answer Correct Answer: B) Invasive species. 24. The use of living organisms (like prokaryotes, fungi, or plants) to detoxify a polluted area is called ..... A) Remediation. B) Going green. C) De-pollution. D) Bioremediation. Show Answer Correct Answer: D) Bioremediation. 25. What does the CBC use 'biocultural' to describe? A) Technological advancements. B) Political structures. C) Financial systems. D) Interconnected nature of people and place. Show Answer Correct Answer: D) Interconnected nature of people and place. 26. If a person proceeds from high latitude to low latitude, then he will observe A) Decrease in species diversity. B) Increase in number of producers but decrease in consumers. C) Increase in species diversity. D) No change in species diversity. Show Answer Correct Answer: C) Increase in species diversity. 27. How and why is this diversity important to the biosphere? A) Diversity is important to the biosphere because it maintains ecosystem stability and supports life. B) Diversity is important to the biosphere because it reduces the amount of oxygen produced. C) Diversity is important to the biosphere because it causes extinction of species. D) Diversity is important to the biosphere because it limits food sources for organisms. Show Answer Correct Answer: A) Diversity is important to the biosphere because it maintains ecosystem stability and supports life. 28. The Earth summit held in Rio de Janeiro in 1992 was called A) For immediate steps to discontinue use of cfcs that were damaging the ozone layer. B) To reduce CO2 emissions and global warming. C) For conservation of biodiversity and sustainable utilisation of its benefits. D) To assess threat posed to native species by invasive weed species. Show Answer Correct Answer: C) For conservation of biodiversity and sustainable utilisation of its benefits. 29. High biodiversity removes the predators and parasites in the ecosystem and makes it safer. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 30. How many species are estimated to be living on Earth? A) Between 10, 000 and 100, 000. B) Between 500, 000 and 1 million. C) Between 1 and 2 million. D) Between 10 million and 50 million. Show Answer Correct Answer: D) Between 10 million and 50 million. 31. Species richness generally increases toward the A) Poles. B) Equator. C) Meridians. D) Parallels. Show Answer Correct Answer: B) Equator. 32. What is a key goal of species conservation efforts? A) To ensure that all species have the same genetic makeup. B) To increase the number of invasive species in ecosystems. C) To maintain and restore habitats and protect species from extinction. D) To decrease biodiversity for easier management of species. Show Answer Correct Answer: C) To maintain and restore habitats and protect species from extinction. 33. A local government is attempting to address habitat fragmentation by providing corridors between habitats that have been separated by development. Officials will monitor the habitats before making a policy decision to put more corridors in place. Which potential consequence of this action should officials monitor as they collect data? A) Increase in edge effect. B) Increase in rates of competition. C) Decrease in access to resources. D) Decrease in biodiversity. Show Answer Correct Answer: A) Increase in edge effect. 34. Fill in the blank:The colonisation of tropical Pacific Islands by humans is said to have led to the extinction of more than ..... species of native birds. A) 200. B) 1, 000. C) 2, 000. D) 500. Show Answer Correct Answer: C) 2, 000. 35. The deforestation of rainforests in South America is example of what specific type of threat to biodiversity? A) Climate Change. B) Pollution. C) Habitat Destruction. D) Invasive Species. Show Answer Correct Answer: C) Habitat Destruction. 36. A keystone species is one that A) Has a higher likelihood of extinction than a nonkeystone species. B) Causes other species to become extinct. C) Has a weak influence on an ecosystem. D) Exerts a strong influence on an ecosystem. Show Answer Correct Answer: D) Exerts a strong influence on an ecosystem. 37. Who publishes the Red Data Book A) International Union for conservation of nature. B) International Union for Nature Conservation. C) International Union of Nature Conservation. D) None of the above. Show Answer Correct Answer: A) International Union for conservation of nature. 38. Why are so many species still unknown to modern science? A) Many of these species are found in remote environments. B) Smaller species receive less attention than large organisms. C) Cataloging these species is a huge task. D) All of the above. Show Answer Correct Answer: D) All of the above. 39. Zoo is an example of ..... type of biodiversity conservation. A) Fx-Situ. B) In-Situ. C) Ex-Situ. D) Axe-Situ. Show Answer Correct Answer: C) Ex-Situ. 40. Rivet popper hypothesis was given by A) Paul Ehrlich. B) Alexander von Humboldt. C) David Tilman. D) Charles Darwin. Show Answer Correct Answer: A) Paul Ehrlich. 41. More than 25 per cent of the drugs currently sold in the market worldwide are derived from plants and 25, 000 species of plants contribute to the traditional medicines used by native peoples around the world. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. What does the designation "Least Concern" mean for species? A) Unknown risk of extinction. B) No risk of extinction. C) High risk of extinction. D) Low risk of extinction. Show Answer Correct Answer: D) Low risk of extinction. ← PreviousRelated 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 7Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books