Phosphorus, which is often a limiting nutrient in ecosystems, is very important because it:
A) is needed for molecules such as ATP, cell membranes, and nucleic acids.
B) evaporates quickly.
C) is found only in sedimentary rocks.
D) is necessary for the production of cellulose so that autotrophs can grow and provide food for heterotrophs.
E) is part of the hydrologic cycle.
Correct Answer:
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