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:

Naturalistic Observation

An investigatory technique that involves monitoring individuals in their natural surroundings without the observer making any changes.

Descriptive Method

Research methods aimed at describing characteristics of a population or phenomenon, often through observation, surveys, or case studies.

Case Study

A research method involving an in-depth examination of an individual, group, or event to explore causation in order to find underlying principles.

Double-Blind Procedure

An experimental technique where neither the participants nor the experimenters know who is receiving a particular treatment, to eliminate bias.