Phosphorus and sulfur are returned to the soil primarily by the actions of A) producers. B) decomposers. C) primary consumers. D) tertiary consumers. What will MOST LIKELY happen if a new producer is introduced into a food web? A) The omnivores will decrease. B) The herbivores will increase. C) The carnivores will decrease. D) The decomposers will decrease. The biosphere is the highest level of organization in the hierarchy of life on earth. Rank the levels of organization from most complex to simplest. A) ecosystems > communities > populations > organisms B) organisms > populations > communities > ecosystems C) ecosystems > organisms > communities > populations D) populations > communities > ecosystems > organisms
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**Step 2:** If a new producer is introduced into a food web, the herbivores will increase. **Step 3:** Ranking the levels of organization from most complex to simplest: Show more…
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The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus because phosphorus and phosphorus-based compounds are usually solids at the typical ranges of temperature and pressure found on Earth. Phosphates move quickly through plants and animals. The processes that move them through the soil or ocean are very slow, making the phosphorus cycle overall one of the slowest biogeochemical cycles. Losses occur in terrestrial environments by A) mineral surfaces, B) leaching and erosion, C) microbial action on humus and manure, and D) plant uptake in the form of fertilizers.
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What is a potential consequence of excess phosphorus and nitrogen in an ecosystem? a. This could result in increased global temperatures. b. Subduction can be promoted. c. These elements might be fixed in excess. d. A dead zone could be produced from depleted oxygen.
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Which process locks phosphorus in a long-term cycle? A. organic materials buried at the bottom of oceans B. phosphates released into the soil C. animals and plants eliminating wastes D. rain eroding mountains
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