Use the Information in the Following Paragraph to Answer the Question

question 48

Multiple Choice

Use the information in the following paragraph to answer the question.
A hypothetical bacterium swims among human intestinal contents until it finds a suitable location on the intestinal lining. It adheres to the intestinal lining using a feature that also protects it from phagocytes, bacteriophages, and dehydration. Fecal matter from a human in whose intestine this bacterium lives can spread the bacterium, even after being mixed with water and boiled. The bacterium is not susceptible to the penicillin family of antibiotics. It contains no plasmids and relatively little peptidoglycan.
Adherence to the intestinal lining by this bacterium is due to its possession of ________.

• A) fimbriae
• B) pili
• C) a capsule
• D) a flagellum

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Definitions:

Marginal Cost

The added expenditure resulting from creating an additional product or service unit.

Long Run

A period of time in which all factors of production and costs are variable, allowing all inputs to be adjusted.

Zero Economic Profit

A situation where total revenues are exactly equal to total costs, indicating no supernormal profit beyond the normal rate of return.

Marginal Cost

The increase in total production cost that comes from making or producing one additional unit of a good.