This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is NOT a threat to biodiversity? A) Overhunting. B) Invasive species. C) Water purification. D) Biomagnification. Show Answer Correct Answer: C) Water purification. 2. Obtains energy and nutrients from autotrophs A) Chemotroph. B) Heterotroph. C) Anerobe. D) Parasite. Show Answer Correct Answer: B) Heterotroph. 3. What unique aspect of Australia is of interest when studying past ecosystems? A) The Australian biota. B) The Great Barrier Reef. C) Its desert landscapes. D) Its modern cities. Show Answer Correct Answer: A) The Australian biota. 4. Why does high biodiversity increase ecosystem stability? A) Ecosystems do best when populations are as large as possible. B) High biodiversity increases the carrying capacity of an ecosystem. C) More diversity increases the chances that organisms can survive changes to an ecosystem. D) Ecosystems are most stable when biodiversity is low. Show Answer Correct Answer: C) More diversity increases the chances that organisms can survive changes to an ecosystem. 5. What is the main cause of global warming? A) Overfishing. B) Deforestation. C) Burning of fossil fuels. D) Depletion of the ozone layer. Show Answer Correct Answer: C) Burning of fossil fuels. 6. An individual living thing is a/an ..... A) Habitat. B) Ecosystem. C) Organism. D) Population. Show Answer Correct Answer: C) Organism. 7. What is a concern regarding the rate of climate change? A) It is happening too slowly to be noticeable. B) It is occurring at a faster rate than in the past. C) It is completely predictable. D) It has stopped in recent years. Show Answer Correct Answer: B) It is occurring at a faster rate than in the past. 8. An organism that eats both plants and animals. A) Herbivore. B) Carnivore. C) Omnivore. D) Producer. Show Answer Correct Answer: C) Omnivore. 9. The bodies of all living things are based on carbon. Which of the following is the primary source of carbon in living things? A) Carbon compounds stored in fossil fuels. B) Carbon compounds in the soil. C) Dissolved carbon dioxide in the biosphere. D) Carbon dioxide in the atmosphere. Show Answer Correct Answer: D) Carbon dioxide in the atmosphere. 10. Which situation is a biotic factor operating within an ecosystem? A) The kind of climate in a given region. B) Carnivores that eat other animals. C) The concentration of hydrogen gas in the air. D) The rate of water flow in a body of water. Show Answer Correct Answer: B) Carnivores that eat other animals. 11. If the producer level of an ecosystem has 750, 000 J of energy, how much energy would be passed on to the secondary consumers? A) 75, 000 J. B) 7, 500 J. C) 750 J. D) 75 J. Show Answer Correct Answer: B) 7, 500 J. 12. Which is an example of herbivory affecting an ecosystem? A) Tall trees block the sunlight from reaching plants on the forest floor. B) Coyotes catch slow-moving rabbits, but not the faster rabbits. C) Deer eat the stems of plants without thorns, allowing plants with thorny stems to thrive. D) Fungi break down dead organic matter, which returns nutrients to the soil. Show Answer Correct Answer: C) Deer eat the stems of plants without thorns, allowing plants with thorny stems to thrive. 13. Which of the following is an example of ecological tolerance? A) A plant species that can survive in both high and low temperatures. B) A plant species that can only survive in low temperatures. C) A plant species that can only survive in high temperatures. D) A plant species that can survive in any temperature. Show Answer Correct Answer: A) A plant species that can survive in both high and low temperatures. 14. What movie is recommended for envisioning the future? A) 2040. B) An Inconvenient Truth. C) The Day After Tomorrow. D) Wall-E. Show Answer Correct Answer: A) 2040. 15. Water enters the atmosphere from trees through the process of A) Transpiration. B) Evaporation. C) Condensation. D) Sublimation. Show Answer Correct Answer: A) Transpiration. 16. What happens when a population reaches carrying capacity? A) Growth & Immigration are equal to Death & Emigration. B) Population growth continues indefinitely. C) Resources become unlimited for the population. D) The population will migrate to a new area. Show Answer Correct Answer: A) Growth & Immigration are equal to Death & Emigration. 17. What is habitat?Apakah maksud habitat? A) Living place of an organismtempat tinggal suatu organisma. B) Physical characteristics of an environmentciri-ciri fizikan suatu persekitaran. C) The interaction between living things and non-living thingsinteraksi antara benda hidup dan benda bukan bidup. D) None of the above. Show Answer Correct Answer: A) Living place of an organismtempat tinggal suatu organisma. 18. Which of the following factors is least likely to affect the variety of organisms that live in a freshwater environment? A) Mud depth. B) Oxygen levels. C) Water flow rate. D) Water temperature. Show Answer Correct Answer: A) Mud depth. 19. An oak tree is a/an ..... A) Producer. B) Primary Consumer. C) Secondary Consumer. D) Decomposer. Show Answer Correct Answer: A) Producer. 20. Which of the following is an example of an abiotic factor? A) Hair. B) Fecal matter. C) Leaf litter. D) Soil. Show Answer Correct Answer: D) Soil. 21. What is meant by the term 'interdependent'? A) Independent. B) Relying on each other. C) Competing for resources. D) Living in isolation. Show Answer Correct Answer: B) Relying on each other. 22. Refers to the ways in which organisms of certain species assist organisms of other species. A) Environment. B) Ecology. C) Interdependence. D) Community. Show Answer Correct Answer: C) Interdependence. 23. An owl and a hawk both eat mice. Which of these describes the relationship between a hawk and an owl? A) Parasitism. B) Competition. C) Predation. D) Mutualism. Show Answer Correct Answer: B) Competition. 24. What is the primary source of energy in an ecosystem? A) Plants. B) Animals. C) Sun. D) None of the above. Show Answer Correct Answer: C) Sun. 25. Which of the following describes the 10% rule A) Only 10% of predators catch a prey when they hunt. B) There is only 10% of the sun's energy available to us to use. C) Only 10% of the energy from each trophic level is passed on to the next. D) None of the above. Show Answer Correct Answer: C) Only 10% of the energy from each trophic level is passed on to the next. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 14 Ecosystem Quiz 1Class 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 10Class 12 Biology Chapter 14 Ecosystem Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books