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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Definitions:

Profit Margin

A financial metric that shows the percentage of revenue that exceeds the costs associated with making or buying the goods or services sold.

Net Income

What remains as a company's profit once revenue is adjusted for taxes and expenses.

Return On Assets

A financial metric that measures the profitability of a company relative to its total assets, indicating how efficiently a company uses its assets to generate earnings.

Price-Earnings Ratio

A valuation metric for stocks, calculating the ratio of a company's current share price to its per-share earnings.