This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 113 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 113 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which biome is hot and dry in summer but cool and moist in winter with a moderate amount of precipitation? A) Grassland. B) Shrubland. C) Coniferous rainforest. D) Temperate deciduous rainforest. Show Answer Correct Answer: B) Shrubland. 2. How can abiotic factors change in an ecosystem? A) Flooding. B) Forest fires. C) Drought. D) All of the above. Show Answer Correct Answer: D) All of the above. 3. The source of all energy in for an ecosystem A) Sun. B) Trees. C) Oxygen. D) Magic. Show Answer Correct Answer: A) Sun. 4. In the carbon cycle, what is one way carbon is released into the atmosphere? A) Photosynthesis. B) Burning of fossil fuels. C) Nitrogen-fixing bacteria in the soil. D) Evaporation. Show Answer Correct Answer: B) Burning of fossil fuels. 5. Which event is the best example of competition between species in a pond? A) Dragonflies landing on lily pads. B) Lizards and snakes lying in the sun. C) Hawks eating mice. D) Frogs and toads eating flies. Show Answer Correct Answer: D) Frogs and toads eating flies. 6. Which organisms may be chemotrophs? Pick all that apply. A) Some bacteria. B) Some plants. C) Some fungi. D) Some animals. E) Some protista. Show Answer Correct Answer: A) Some bacteria. 7. The clownfish helping anemone catch other fish and the sea anemone protecting it. A) Mutualism. B) Commensalism. C) Parasitism. D) None of above. Show Answer Correct Answer: A) Mutualism. 8. In terms of carbon and the atmosphere, autotrophs A) Remove carbon through photosynthesis and release carbon by cellular respiration. B) Only remove carbon through photosynthesis. Show Answer Correct Answer: A) Remove carbon through photosynthesis and release carbon by cellular respiration. 9. Commensalism A) Both are benefited. B) One organism is benefited while the other is neither helped nor harmed. C) One organism benefits while the other is harmed. D) None of above. Show Answer Correct Answer: B) One organism is benefited while the other is neither helped nor harmed. 10. What do decomposers eat? A) Only plants. B) Plants and animals. C) Only other animals. D) Dead organisms. Show Answer Correct Answer: D) Dead organisms. 11. What happens when different species try to occupy the same niche? A) The species compete with each other. B) The species cooperate with each other. C) The species coexist with each other. D) All of the above. Show Answer Correct Answer: A) The species compete with each other. 12. Which organisms are necessary for the recycling of nitrogen? A) Frogs. B) Grasshoppers. C) Snakes. D) Bacteria. Show Answer Correct Answer: D) Bacteria. 13. Cutting down or destroying forests is called ..... A) Cultivation. B) Flooding. C) Deforestation. D) Erosion. Show Answer Correct Answer: C) Deforestation. 14. What equipment is used to estimate the popultion size of plants in an ecosystem? A) A square. B) A line transect. C) A random sampler. D) A rectangle. Show Answer Correct Answer: A) A square. 15. What is biodiversity? A) The different ways species reproduce. B) The degree of variation of life on Earth. C) A way to describe similarities between different species. D) The process of creating new species. Show Answer Correct Answer: B) The degree of variation of life on Earth. 16. In eutrophication, what directly causes the death of fish? A) The plants use up oxygen in respiration. B) The fish are poisoned by high CO2 levels. C) Bacteria use up oxygen in respiration. D) The fish use up oxygen in respiration. Show Answer Correct Answer: C) Bacteria use up oxygen in respiration. 17. The number of organisms per acre is an example of: A) Population growth. B) Population size. C) Population density. D) None of above. Show Answer Correct Answer: C) Population density. 18. An environment can support only as many organisms as the available energy, minerals, and oxygen will allow. Which term is best described by this statement? A) Biological feedback. B) Carrying capacity. C) Homeostatic control. D) Niche. Show Answer Correct Answer: B) Carrying capacity. 19. An organism that eats other organisms for energy A) Herbivore. B) Consumer. C) Prey. D) Producer. Show Answer Correct Answer: B) Consumer. 20. Which one of the following is not a way of reducing negative human effects on ecosystems and maintaining biodiversity? A) A recycling resources (rather than landfill). B) B removal of hedgerows on farming land. C) C breeding programmes for endangered species. D) D reduction of deforestation. Show Answer Correct Answer: B) B removal of hedgerows on farming land. ← PreviousNext →Related QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9Ecology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books