Phosphorus, Which Is Often a Limiting Nutrient in Ecosystems, Is

question 6

Multiple Choice

Phosphorus, which is often a limiting nutrient in ecosystems, is important because it

• A) is part of the hydrologic cycle.
• B) is found only in sedimentary rocks.
• C) evaporates quickly.
• D) is necessary for the production of cellulose so that autotrophs can grow and provide food for heterotrophs.
• E) is needed for molecules such as adenosine triphosphate (ATP), cell membranes, and nucleic acids.

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