The Abundance of Cyanobacterial Mats Has Greatly Declined Due to the Evolution

question 44

Multiple Choice

The abundance of cyanobacterial mats has greatly declined due to the evolution of

• A) antimicrobial-producing fungi.
• B) bacteriophages.
• C) animal grazers.
• D) Proteobacteria.

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Definitions:

Variable Costs

Expenses that fluctuate based on the amount of products or services a company generates.

Break-even Sales

The amount of revenue that a business must generate to cover its fixed and variable costs before starting to realize a profit.

Fixed Costs

Expenses that do not change with the level of goods or services produced by the business, such as rent, salaries, and insurance premiums.

Break-even Sales

The amount of revenue from sales that exactly covers fixed and variable costs, resulting in neither profit nor loss.