Which Statement About the Global Phosphorus Cycle is True

Question

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.

Accepted Answer

Phosphorus is a key nutrient that influences the nitrogen cycle because it is required for the energy-intensive process of nitrogen fixation.