This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 15 Biodiversity And Conservation – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the primary reason biologists want to preserve species that are not directly used by humans? A) They might become extinct soon. B) They offer potential sources of desirable genes for future use. C) They are beautiful. D) They help reduce competition between species. Show Answer Correct Answer: B) They offer potential sources of desirable genes for future use. 2. How can habitat disruption affect biodiversity? A) It can lead to loss of biodiversity. B) It will lead to new species taking over all of the habitats. C) It will lead to climate change. D) It will cause the animals to get sick. Show Answer Correct Answer: A) It can lead to loss of biodiversity. 3. The Evil Quartet is the sobriquet used to describe four causes of biodiversity losses. One of them is given in the options below. Tick the appropriate one. A) An evil spirit came in disguise to the earth and consumed biodiversity. B) When a species becomes extinct, the plant and animal species associated with it also becomes extinct. C) Aliens arrived from outer space and destroyed earth's biodiversity. D) None of the above. Show Answer Correct Answer: B) When a species becomes extinct, the plant and animal species associated with it also becomes extinct. 4. Extinction rates are significantly ..... in recent decades than before. A) Lower. B) Higher. C) All the above. D) None of the above. Show Answer Correct Answer: B) Higher. 5. What is the major cause of extinction and loss of biodiversity? A) Climate change. B) Deforestation. C) Pollution. D) Poaching. Show Answer Correct Answer: A) Climate change. 6. True or false. Pollution tends to increase biodiversity. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 7. How does pollution threaten biodiversity? A) It helps plants grow faster. B) It provides clean water. C) It harms living things and their habitats. D) It increases animal populations. Show Answer Correct Answer: C) It harms living things and their habitats. 8. A natural resource that is present in limited amounts or requires a long period of time to be replaced A) Non-renewable resource. B) Over exploitation. C) Sustainable use. D) Renewable resource. Show Answer Correct Answer: A) Non-renewable resource. 9. The Ecological hotspot found in the south America is A) Queensland. B) Central American lowland forest. C) Western Equador and coloumbian congo. D) Northern borneo. Show Answer Correct Answer: C) Western Equador and coloumbian congo. 10. An ecosystem is considered stable if it is both resistant and resilient. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. Which level of ecological organization is concerned with both the biotic and abiotic components of an environment? A) Community. B) Population. C) Ecosystem. D) Biosphere. Show Answer Correct Answer: C) Ecosystem. 12. Species diversity increases as we proceed from ..... Species divrsity decreases as we proceed from ..... A) High altitude to low altitude and high latitude to low latitude. B) Low altitude to high altitude and high latitude to low latitude. C) Low altitude to high altitude and low latitude to high latitude. D) High altitude to low altitude and low latitude to high Latitude. Show Answer Correct Answer: A) High altitude to low altitude and high latitude to low latitude. 13. A wooded area has been divided by a housing development and is threatening the biodiversity of the area. What term is used to describe this threat from human activities? A) Habitat fragmentation. B) Acid precipitation. C) Habitat augmentation. D) Global warming. Show Answer Correct Answer: A) Habitat fragmentation. 14. Which one of the following is an endangered plant species of India A) Rauwolfia serpentina. B) Santalum album. C) Cycas beddonei. D) All of the above. Show Answer Correct Answer: D) All of the above. 15. A natural resource that is replaced by natural processes faster than it is consumed A) Renewable resource. B) Bioremediation. C) Sustainable use. D) Non-renewable resource. Show Answer Correct Answer: A) Renewable resource. 16. The ethical argument for conserving biodiversity as mentioned in the passage is: A) Humans have a moral responsibility to protect other living beings. B) Biodiversity increases agricultural productivity. C) Conserving biodiversity leads to economic growth. D) Biodiversity reduces pollution levels. Show Answer Correct Answer: A) Humans have a moral responsibility to protect other living beings. 17. The disappearance of a species when the last of its members dies. A) Extinction. B) Mass Extinction. C) Background Extinction. D) None of the above. Show Answer Correct Answer: A) Extinction. 18. 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) Endemic species. B) Keystone species. C) Flagship species. D) Cute species species. Show Answer Correct Answer: B) Keystone species. 19. The act to prevent extinction, recover imperiled plants and animals, and protect the ecosystems on which they depend upon is called ..... A) The Fossil Fuel Burning Act of 2000. B) Congressional Bill 78655. C) The Endangered Species Act of 1973. D) Project Save. Show Answer Correct Answer: C) The Endangered Species Act of 1973. 20. Cyanobacteria are- A) Only fresh water. B) Only marine. C) Only terrestrial. D) Aquatic and terrestrial. Show Answer Correct Answer: D) Aquatic and terrestrial. 21. Why are species on islands more vulnerable to extinction? A) They have more genetic diversity. B) They have access to more natural resources. C) They have fewer predators. D) They evolved without natural predators. Show Answer Correct Answer: D) They evolved without natural predators. 22. 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. 23. 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. 24. 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. 25. The differences in DNA among individuals within species and populations is called A) Biodiversity hotspot. B) Genetic diversity. C) Endemic. D) Species diversity. Show Answer Correct Answer: B) Genetic diversity. ← 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