This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is NOT an example of density-dependent limiting factors? A) Disease. B) Wildfires. C) Predation. D) Food Scarcity. Show Answer Correct Answer: B) Wildfires. 2. A herbivore is ..... A) An animal that feeds only on plants. B) An organism that produces its own food. C) An animal that feeds only on meat. D) An animal that feeds on plants and animals. Show Answer Correct Answer: A) An animal that feeds only on plants. 3. Which of the following is a characteristic of island geography? A) Isolation by mountains. B) Isolation by deserts. C) Isolation by forests. D) Isolation by water. Show Answer Correct Answer: D) Isolation by water. 4. Weather (such as rain) and soil conditions are considered to be part of the ..... factors of an ecosystem. A) Biotic. B) Antibiotic. C) Abiotic. D) Biomass. Show Answer Correct Answer: C) Abiotic. 5. Where do all life forms get their energy? A) Earth's Core. B) Water. C) Plants. D) The Sun. Show Answer Correct Answer: D) The Sun. 6. An organism that obtains energy by feeding on other organism is a ..... A) Producer. B) Consumer. C) Decomposer. D) None of the above. Show Answer Correct Answer: B) Consumer. 7. What is the primary reason for habitat destruction leading to species extinction? A) Global warming. B) Invasive species. C) Pollution. D) Human population growth. Show Answer Correct Answer: D) Human population growth. 8. Radiometric dating is a technique used to calculate: A) The age of fossils. B) The age of rocks and minerals. C) The type of species. D) The closest related ancestor of a species. Show Answer Correct Answer: B) The age of rocks and minerals. 9. Why do smaller population sizes in fragmented habitats lead to extinction? A) Gene flow is restricted and inbreeding occurs. B) Larger territories are available for smaller populations. C) Smaller populations have more genetic diversity. D) Fragmented habitats provide more resources for survival. Show Answer Correct Answer: A) Gene flow is restricted and inbreeding occurs. 10. What is a limiting factor in population dynamics? A) A limiting factor stops a population from growing large. B) A limiting factor is a type of predator that controls population size. C) A limiting factor is an environmental condition that promotes growth. D) A limiting factor is a genetic trait that enhances survival. Show Answer Correct Answer: A) A limiting factor stops a population from growing large. 11. Which of these describes a mutually beneficial relationship between two organisms? A) A dog with worms in its intestine. B) A turtle and a snail that both eat grass live in a river. C) A honeybee pollinating a plant and receiving nectar for food. D) A small fish attached to a shark, eating tiny pieces of the shark's food as it floats. Show Answer Correct Answer: C) A honeybee pollinating a plant and receiving nectar for food. 12. A wildlife corridor A) Allows safe passage of animals between two areas of land. B) Allows birds to swim. C) Prevents prey being consumed. D) Is an areas that can be developed for houses. Show Answer Correct Answer: A) Allows safe passage of animals between two areas of land. 13. The study of life. A) Bio. B) Biology. C) Biome. D) Biodiversity. Show Answer Correct Answer: B) Biology. 14. Which of the following is an abiotic factor of an ecosystem? A) Trees. B) Grasses. C) Temperature. D) Flowering plants. Show Answer Correct Answer: C) Temperature. 15. Decomposer organisms break down dead organisms, providing energy to carnivores A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. The percentage of Solar energy absorbed in the atmosphere is A) 0.57. B) 0.59. C) 0.6. D) 0.4. Show Answer Correct Answer: A) 0.57. 17. An organism that can make its own food A) Decomposer. B) Consumer. C) Producer. D) None of the above. Show Answer Correct Answer: C) Producer. 18. What is the significance of DNA sequencing in the study of phylogeny? A) It has decreased the accuracy of phylogenetic trees. B) It is only used for studying plants, not animals. C) It has made the study of phylogeny obsolete. D) It has allowed for the identification of relationships not previously known. Show Answer Correct Answer: D) It has allowed for the identification of relationships not previously known. 19. What is the main function of stomata in the leaves of plants? A) Gas exchange. B) Photosynthesis. C) Water absorbtion. D) Protection. Show Answer Correct Answer: A) Gas exchange. 20. Development reduces biodiversity by: A) Creating habitats. B) Increasing species. C) Fragmenting habitats. D) Preventing extinction. Show Answer Correct Answer: C) Fragmenting habitats. 21. What is a diagram that shows the amount of energy that move from one feeding level to another A) Food web. B) Food chain. C) Energy pyramid. D) None of the above. Show Answer Correct Answer: C) Energy pyramid. 22. A community of organisms and their abiotic, or nonliving environment is called ..... A) Ecology. B) Ecosystem. C) Population. D) Community. Show Answer Correct Answer: B) Ecosystem. 23. A food chain shows how many possible paths along which energy can move through the ecosystem A) Two or three. B) Only one. C) Many. D) None of the above. Show Answer Correct Answer: B) Only one. 24. A salt marsh that helps prevent flooding of a coastal town is an example of what ecosystem service? A) Buffering. B) Nutrient cycling. C) Pest regulation. D) Carbon storage. Show Answer Correct Answer: A) Buffering. 25. Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls? A) The horned owl population will consume more field mice. B) Horned owls will follow the field mice to a different area. C) The horned owl population will increase in the area. D) Horned owls will change to a plant-based diet. Show Answer Correct Answer: B) Horned owls will follow the field mice to a different area. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 14 Ecosystem Quiz 1Class 12 Biology Chapter 14 Ecosystem Quiz 2Class 12 Biology Chapter 14 Ecosystem Quiz 3Class 12 Biology Chapter 14 Ecosystem Quiz 4Class 12 Biology Chapter 14 Ecosystem Quiz 5Class 12 Biology Chapter 14 Ecosystem Quiz 6Class 12 Biology Chapter 14 Ecosystem Quiz 7Class 12 Biology Chapter 14 Ecosystem Quiz 8Class 12 Biology Chapter 14 Ecosystem Quiz 9Class 12 Biology Chapter 14 Ecosystem Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books