This quiz works best with JavaScript enabled. Home > Ecology Environment > Ecology And Environment – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology And Environment Quiz 23 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An increase in the atmospheric levels of carbon dioxide (CO2) is the biggest contributor to which of the following? A) El Nino. B) Global warming. C) Wind storms. D) Ozone depletion. Show Answer Correct Answer: B) Global warming. 2. Any close relationship between species, including mutualism, commensalism, and parasitism A) Energy through an ecosystem. B) Symbiosis. C) Energy pyramid. D) Habitat. Show Answer Correct Answer: B) Symbiosis. 3. Biotic factors of an ecosystem are: A) Non-living. B) Plants. C) Living things. D) Soil. Show Answer Correct Answer: C) Living things. 4. An environmental factor such as predation, disease, and competition that depends on the number of members in a population per unit A) Dispersion. B) Density-independent factor. C) Density-dependent factor. D) Population growth rate. Show Answer Correct Answer: C) Density-dependent factor. 5. The primary cause of invasive species introduction is A) Too much food. B) Human actions. C) Weather events. D) Asteroids. Show Answer Correct Answer: B) Human actions. 6. Choose the most common way that invasive organisms threaten their adopted ecosystems? A) They reproduce quickly. B) They compete with native organisms for resources. C) They have fewer uses for humans in the area. D) None of above. Show Answer Correct Answer: B) They compete with native organisms for resources. 7. How does the latitude of the tundra generally compare with that of the taiga? A) The tundra is in polar regions while the taiga is near the equator. B) The taiga is in polar regions while the tundra is near the equator. C) The tundra is in polar regions while the taiga is slightly closer to the equator. D) The taiga is in polar regions while the tundra is slightly closer to the equator. Show Answer Correct Answer: C) The tundra is in polar regions while the taiga is slightly closer to the equator. 8. After a catastrophic wildfire that clears the land of all plants and trees, - A) Plants will not grow again in the burned area. B) Bushes will grow in the area before weeds grow. C) Weeds will grow in the area before trees grow. D) Only trees will grow in the burned area. Show Answer Correct Answer: C) Weeds will grow in the area before trees grow. 9. Too many organisms in one area for the resources available is called A) Biodiversity. B) Overpopulation. C) Pollution. D) Renewable resource. Show Answer Correct Answer: B) Overpopulation. 10. Which is not one of the 4 steps of Natural Selection? A) Struggle to Survive. B) Artificial Selection. C) Inherited Variation. D) Over-Reproduction. Show Answer Correct Answer: B) Artificial Selection. 11. Which two biomes have the least precipitation? A) Tropical rain forest and temperate grasslan. B) Savanna and tropical dry forest. C) Tundra and desert. D) Boreal forest and temperate woodland. Show Answer Correct Answer: C) Tundra and desert. 12. Competition between two different species, such as Paramecium caudatum & Paramecium aurelia, is called ..... competition. A) Interspecific. B) Intraspecific. C) Predator. D) Herbivore. Show Answer Correct Answer: A) Interspecific. 13. Abiotic factors are parts of the environment that are ..... A) Nonliving. B) Living. C) Populations. D) Vegetation. Show Answer Correct Answer: A) Nonliving. 14. Grazing cows disturb the grass and cause insects to fly around the cows as they eat. In turn, birds swoop in and eat the insects. This type of feeding relationship is an example of A) Commensalism. B) Mutualism. C) Parasitism. D) Predation. Show Answer Correct Answer: A) Commensalism. 15. The greatest biodiversity on earth is found in the ..... biome. A) Taiga. B) Grassland. C) Temperate deciduous forest. D) Tropical rainforest. Show Answer Correct Answer: D) Tropical rainforest. 16. This biome is near the equator. A) Temperate deciduous forest. B) Grassland. C) Rainforest. D) Desert. Show Answer Correct Answer: C) Rainforest. 17. Process by which plants convert sunlight to produce food and oxygen. A) Niche. B) Habitat. C) Respiration. D) Photosynthesis. Show Answer Correct Answer: D) Photosynthesis. 18. Organisms move away from an area A) Competition. B) Predation. C) Emigration. D) Immigration. Show Answer Correct Answer: C) Emigration. 19. Which of the following cycles needs different types of bacteria to make the most common gas in the atmosphere useful to plants? A) The water cycle. B) The carbon cycle. C) The nitrogen cycle. D) The hydrogen cycle. Show Answer Correct Answer: C) The nitrogen cycle. 20. Why is it important to use forest areas sustainably? A) So animals have food. B) Because animals use forests for food, shelter and life. C) So people can see and appreciate forests in the future. D) All of the above. Show Answer Correct Answer: D) All of the above. ← PreviousNext →Related 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 9Ecology And Environment Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books