Cyanobacteria Are Obviously Capable of Photosynthesis,but Many of Them Also

question 22

Multiple Choice

Cyanobacteria are obviously capable of photosynthesis,but many of them also convert nitrogen gas into reduced forms of nitrogen (such as ammonia) that can be used by cells in the synthesis of nitrogen-containing organic compounds,including amino acids and nucleotides.This process is called ______.

• A)nitrogen fixation
• B)denitrification
• C)nitrification
• D)respiration
• E)ammoniation

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Definitions:

Contribution Margin

The residual amount from sales income following the deduction of variable expenses, allocated for covering fixed costs and producing profit.

Variable Costs

Expenses that vary in relation to the amount of production or business activity.

Fixed Costs

Costs that do not change with the level of output produced, such as rent and salaries.

Break-Even Point

The financial analysis term where total costs and total revenues are equal, resulting in no net loss or gain for the business.