Initial Studies of the Influenza a Virus by Walter Fitch

question 22

Multiple Choice

Initial studies of the influenza A virus by Walter Fitch and colleagues showed that ________.

• A) influenza A actually has DNA as its genetic material
• B) selection is causing influenza A to become more virulent over time
• C) selection by the immune system drives change in hemagglutinin's antigenic sites
• D) protein evolution in influenza A is consistent with the neutral theory
• E) flu strains from one host cannot exchange genetic material with strains from another

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Definitions:

Alarm Reaction

The initial phase in the body’s response to stress, activating various physiological changes for fight or flight.

Resistance Reaction

A psychological response where an individual opposes changes or challenges to their thoughts, behaviors, or environment.

Adaptive

Characterized by the ability to adjust effectively to new conditions or to those changes in one's environment.

Maladaptive

Behaviors or thought patterns that are counterproductive or interfere negatively with functioning and well-being.