Refer to the Figure

question 181

Multiple Choice

Refer to the figure. Which statement about the lungfish (shown) is true?

• A) It can survive in mud in an inactive state by breathing air.
• B) It exchanges gases only through gills.
• C) Its gills are modified lunglike sacs.
• D) It is primarily terrestrial but is able to move into aquatic habitats.
• E) It possess a swim bladder and lunglike sacs.

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Definitions:

Fixed Cost

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

Lawn-mowing

The process of cutting or trimming the grass in a yard or field to maintain a neat and uniform appearance.

Variable Costs

Expenses that change in proportion to the amount of goods or services produced, like labor and materials.

Profit-maximizing Output

The point of production where a company reaches its maximum profit, occurring when marginal cost matches marginal revenue.