This quiz works best with JavaScript enabled. Home > Ecology Environment > Studies > Ecology And Environment – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology And Environment Quiz 35 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is one of the greatest threats to biodiversity on Earth? A) Habitat destruction. B) Loss of drinking water. C) Decrease in food supply. D) Pollution. Show Answer Correct Answer: A) Habitat destruction. 2. Which is the smallest level of an ecosystem? A) Organsism. B) Population. C) Community. D) Ecosystem. Show Answer Correct Answer: A) Organsism. 3. A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in areas where they had lived? A) Certain producer organisms would become moreabundant in the area. B) Othermanatees would move into the area and restore balance. C) Predators in the area would have morefood to eat. D) Thearea would not be affected. Show Answer Correct Answer: A) Certain producer organisms would become moreabundant in the area. 4. Symbiotic relationship in that is positive for both organisms. A) Paresitism. B) Mutualism. C) Commensalism. D) Symbiosis. Show Answer Correct Answer: B) Mutualism. 5. Which of the following terms is defined as genetic variation within populations and variation of populations within ecosystems that makeup the biosphere? A) Biome. B) Biodiversity. C) Ecosystem. D) Niche. Show Answer Correct Answer: B) Biodiversity. 6. Which of the following is an example of a community? A) All the tiger sharks in the ocean. B) All the oak trees in a forest. C) All the cows on a farm. D) The plants and animals in the same area. Show Answer Correct Answer: D) The plants and animals in the same area. 7. Which processes are most directly involved in the cycling of carbon, hydrogen, and oxygen between plants and animals in an ecosystem? A) Transpiration and excretion. B) Photosynthesis and respiration. C) Dehydration synthesis and hydrolysis. D) Decomposition and succession. Show Answer Correct Answer: B) Photosynthesis and respiration. 8. A producer is a (n) ..... A) Heterotroph. B) Omnitroph. C) Autotroph. D) Oscartroph. Show Answer Correct Answer: C) Autotroph. 9. Which of the following illustrates the correct ordering of trophic levels? A) Decomposers-carnivores-autotrophs-herbivores. B) Herbivores-autotrophs-carnivores-decomposers. C) Producers-herbivores-carnivores-decomposers. D) Carnivores-producers-omnivores. Show Answer Correct Answer: C) Producers-herbivores-carnivores-decomposers. 10. What biome has animals that are well adapted to the very cold? A) Desert. B) Rain forest. C) Tundra. D) Savanna. Show Answer Correct Answer: C) Tundra. 11. A consumer is a ..... A) Heterotroph. B) Autotroph. C) Omnitroph. D) Consumotroph. Show Answer Correct Answer: A) Heterotroph. 12. Biodiversity can be maintained by protecting A) Habitats. B) Exotic species. C) Crops. D) Factories. Show Answer Correct Answer: A) Habitats. 13. Something that interrupts normal activity A) Disruption. B) Noises. C) Symbiosis. D) Interaction. Show Answer Correct Answer: A) Disruption. 14. What is a term for a group of populations of different species living in the same area? A) Population. B) Community. C) Ecosystem. D) Organism. Show Answer Correct Answer: B) Community. 15. What type of model offers a more complete picture of feeding relationships? A) Food map. B) Food chain. C) Food web. D) None of above. Show Answer Correct Answer: C) Food web. 16. Decomposing plant and animal matter are MAJOR parts of which natural life cycles? A) Nitrogen cycle. B) Carbon cycle. C) Water cycle. D) Both nitrogen and carbon cycles. Show Answer Correct Answer: D) Both nitrogen and carbon cycles. 17. People can reduce waste by using products that are A) Non-renewable. B) Fossil fuels. C) Biodegradable. D) Exotic. Show Answer Correct Answer: C) Biodegradable. 18. Act of one organism feeding on another organism. A) Predation. B) Symbiosis. C) Community. D) Pasitism. Show Answer Correct Answer: A) Predation. 19. What does every food chain start with? A) Producers. B) Sun. C) Consumer. D) Decomposers. Show Answer Correct Answer: B) Sun. 20. What factor describes when populations increase because animals are moving into a population? A) Emigration. B) Limiting Factors. C) Immigration. D) Exponential Growth. Show Answer Correct Answer: C) Immigration. ← PreviousNext →Related QuizzesEcology Environment QuizzesEcology And Environment Quiz 1Ecology And Environment Quiz 2Ecology And Environment Quiz 3Ecology And Environment Quiz 4Ecology And Environment Quiz 5Ecology And Environment Quiz 6Ecology And Environment Quiz 7Ecology And Environment Quiz 8Ecology And Environment Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books