A Colony of Mice Is Treated with a Nonvirulent Strain

question 31

Multiple Choice

A colony of mice is treated with a nonvirulent strain of the bacterium Streptococcus pneumoniae . Before treatment, a researcher exposed this nonvirulent strain to heat-killed cells of a virulent strain. What will be the effect on the mouse population? ​

• A)The mice will all remain healthy.
• B)Some mice will die, but most will remain healthy. ​
• C)The mice will develop pneumonia. ​
• D)Some mice will develop pneumonia, but most will remain healthy. ​
• E)The mice will become immune to the bacteria. ​

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Definitions:

Alarm Output

A signal or notification generated by a system in response to a detected abnormal condition, aimed at alerting personnel to take corrective action.

Temperature Switch

A switch that operates based on the temperature, either turning on or off when a specific temperature threshold is reached.

Manual Automatic

A system or process that can be operated either manually by a human operator or automatically by a machine or software without human intervention.

Latch Instruction

The Latch Instruction in programmable logic controllers (PLCs) is used to maintain the output state until a specific reset condition is met.