Which Factors Govern the Rate of Primary Productivity in Freshwater

question 69

Multiple Choice

Which factors govern the rate of primary productivity in freshwater and marine ecosystems?

• A) availability of water
• B) availability of sunlight and nutrients only
• C) depth of the water only
• D) depth of the water and availability of sunlight and nutrients
• E) availability of oxygen

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Definitions:

Cost

The amount of money or resources expended to obtain, produce, or maintain an object or service.

Sales

The revenue a company earns from selling goods or services.

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The difference between sales revenue and the cost of goods sold, before deducting operating expenses, interest, and taxes.

Expense

Outflows or using up of assets as a result of the company’s efforts to generate revenue.