This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 14 Ecosystem – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 14 Ecosystem Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which biotic factor affects the size of a population of animals? A) Kinds of predators. B) Amount of oxygen. C) Average temperature. D) Availability of water. Show Answer Correct Answer: A) Kinds of predators. 2. A microhabitat has its own set of environmental conditions called its A) Climate. B) Macroclimate. C) Microclimate. D) Small biome. Show Answer Correct Answer: C) Microclimate. 3. The role an organism plays in its environment is known as its A) Ecosystem. B) Habitat. C) Niche. D) Biosphere. Show Answer Correct Answer: C) Niche. 4. Rantai makanan yang benar dalam ekosistem perairan adalah ..... A) Ikan herbivora $\rightarrow$ ikan karnivora $\rightarrow$ fitoplankton $\rightarrow$ pengurai. B) Fitoplankton $\rightarrow$ ikan karnivora $\rightarrow$ ikan herbivora $\rightarrow$ pengurai. C) Fitoplankton $\rightarrow$ ikan herbivora $\rightarrow$ ikan karnivora $\rightarrow$ pengurai. D) Pengurai $\rightarrow$ fitoplankton $\rightarrow$ ikan karnivora $\rightarrow$ ikan herbivora. Show Answer Correct Answer: C) Fitoplankton $\rightarrow$ ikan herbivora $\rightarrow$ ikan karnivora $\rightarrow$ pengurai. 5. The interval includes: A) An area of intolerance, an area of environmental stress and an optimal area. B) An optimal area for all populations of the ecosystem and areas for each of the specific populations. C) Different areas to those described above. D) An optimal area and two areas of environmental stress. Show Answer Correct Answer: B) An optimal area for all populations of the ecosystem and areas for each of the specific populations. 6. The place or natural conditions in which a plant or animal lives is called: A) Population. B) Habitat. C) Climate. D) Ecosystem. Show Answer Correct Answer: B) Habitat. 7. What will most likely be the result as humans move into new areas, forests are clear cut and housing developments are built? A) Global temperatures will decrease because trees are removed. B) Many organisms will lose their homes because their habitats have been destroyed. C) Better sanitation in the area will reduce the amount of pollution. D) The rainfall in the area will increase because there will be increased runoff. Show Answer Correct Answer: B) Many organisms will lose their homes because their habitats have been destroyed. 8. What factors can affect the population dynamics of a species? A) Availability of food and resources, predation, competition, disease, natural disasters, and human activities. B) Climate change and global warming. C) Social media influence. D) Alien invasion. Show Answer Correct Answer: A) Availability of food and resources, predation, competition, disease, natural disasters, and human activities. 9. Scientists are studying photosynthesis in a forest ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the forest carry out photosynthesis? A) All organisms in the forest. B) Animals and decomposers. C) Plants and decomposers. D) Plants. Show Answer Correct Answer: D) Plants. 10. How is peat formed? A) From methanogenic archeans under anerobic and acidic conditions in deep sea vents. B) From partially decomposed organic matter under anaerobic and acidic conditions in waterlogged soils. C) From porous limestone under high pressure, aerobic and alkaline conditions in ocean beds. D) From bituminous coal under high pressure, anaerobic conditions below ground. Show Answer Correct Answer: B) From partially decomposed organic matter under anaerobic and acidic conditions in waterlogged soils. 11. What is Earth's carbon? A) Carbon found only in the atmosphere. B) Carbon trapped in matter underground, then converted to fossil fuels. C) Carbon that is only in plants. D) Carbon that is only in animals. Show Answer Correct Answer: B) Carbon trapped in matter underground, then converted to fossil fuels. 12. When growth stops, populations: A) Remain constant. B) Fluctuate around carrying capacity. C) Go extinct. D) Increase rapidly. Show Answer Correct Answer: B) Fluctuate around carrying capacity. 13. How do you calculate an average of 5 numbers? A) Add the five numbers together. B) Add the numbers together and divide by two. C) Add the numbers together and divide by five. D) Add the numbers together and multiply by five. Show Answer Correct Answer: C) Add the numbers together and divide by five. 14. What principle states that two species competing for the same resources cannot coexist? A) Mutual Exclusion Principle. B) Niche Partitioning Principle. C) Resource Segregation Principle. D) Principle of Competitive Exclusion. Show Answer Correct Answer: D) Principle of Competitive Exclusion. 15. What are the threats to biodiversity in today's world? A) Habitat destruction, climate change, pollution, overexploitation of natural resources, and invasive species. B) Alien abductions, government conspiracies, and zombie apocalypse. C) All the above. D) None of the above. Show Answer Correct Answer: A) Habitat destruction, climate change, pollution, overexploitation of natural resources, and invasive species. 16. What is the goal of mine reclamation? A) To create recreational parks. B) To increase the profitability of mining. C) To restore land to a natural or economically usable state. D) To expand mining operations. Show Answer Correct Answer: C) To restore land to a natural or economically usable state. 17. What is the primary source of energy for all life on Earth? A) Atmospheric gases. B) The Sun. C) Water. D) Soil nutrients. Show Answer Correct Answer: B) The Sun. 18. Cara hidup bersama antara dua organisme yang berlawanan yang satu mendapatkan keuntungan sedangkan yang lainnya tidak diuntungkan dan tidak dirugikan disebut ..... A) Simbiosis mutualisme. B) Simbiosis parasitisme. C) Simbiosis komensalisme. D) Simbiosis amensalisme. Show Answer Correct Answer: C) Simbiosis komensalisme. 19. Living and non-living things in one place and how they interact together are called an: A) Community. B) Organism. C) Ecosystem. D) Population. Show Answer Correct Answer: C) Ecosystem. 20. All of the following are negative impacts of human activity EXCEPT ..... A) Pollution. B) Deforestation. C) Overfishing. D) Planting seeds. Show Answer Correct Answer: D) Planting seeds. 21. The term 'ecosystem' was coined by A) R H whittakar. B) Charles Darwin. C) Sir Arthur Tansely. D) Lord Rutherford. Show Answer Correct Answer: C) Sir Arthur Tansely. 22. What is one potential impact of biotechnology on society? A) It has no impact on society. B) It can lead to ethical concerns regarding genetic modification. C) It only affects agricultural practices. D) It is solely beneficial with no drawbacks. Show Answer Correct Answer: B) It can lead to ethical concerns regarding genetic modification. 23. Which of the following describes a codon A) 3 RNA bases. B) A type of tRNA molecules. C) A group of three amino acids. D) A type of gene. Show Answer Correct Answer: A) 3 RNA bases. 24. Which increases population size? A) Death and emigration. B) Birth and immigration. C) Natural disasters. D) Predation. Show Answer Correct Answer: B) Birth and immigration. 25. Humans are considered ..... A) Consumers. B) Decomposers. C) Producers. D) None of the above. Show Answer Correct Answer: A) Consumers. ← 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