Which Statement About the Global Phosphorus Cycle Is True

question 38

Multiple Choice

Which statement about the global phosphorus cycle is true?

• A) It has a large atmospheric pool.
• B) Because of the relatively high metabolic demand for phosphorus in the fixation of nitrogen gas, the rate of the nitrogen cycle is influenced by the availability of phosphorus.
• C) Only a small fraction of the phosphorus transported from aquatic to terrestrial ecosystems is deposited in deep ocean sediments and lost.
• D) The smallest pools of terrestrial phosphorus are found in soils.