A Commensal Bacterium

question 18

Multiple Choice

A commensal bacterium

• A) may also be an opportunistic pathogen.
• B) is beneficial to its host.
• C) does not receive any benefit from its host.
• D) does not infect its host.
• E) is beneficial to, and does not infect, its host.

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Definitions:

Natural Gas Pipeline

A system of pipes that transports natural gas from its source to the consumers or to a processing plant.

Diminishing Returns to Scale

A situation where, as more inputs are used, the incremental increase in output decreases.

Economies of Scale

Economies of scale refer to the cost advantages that enterprises obtain due to their scale of operation, with cost per unit of output decreasing with increasing scale.

Constant Returns to Scale

A situation in production where increasing the inputs exactly proportionally results in an equivalent increase in output.