If You Examine a Natural Population of Bacteria,it Is Common

question 44

Multiple Choice

If you examine a natural population of bacteria,it is common to find some antibiotic-sensitive and some antibiotic-resistant strains,even if the population has never been exposed to any antibiotic.Which explanation could account for this situation?

• A) The resistant strain developed as a mutation and had no negative effect on fitness.
• B) Selection favored the resistant strain and maintained it in the population so that it would be prepared for future antibiotic exposure.
• C) The resistant strain had greater fitness compared to sensitive strains when the antibiotic was absent.
• D) none of these
• E) all of these

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Definitions:

Sociometric Structure

The pattern of relationships and social networks within a group, measured through sociometric techniques.

Attraction Structure

The pattern or framework of how attractions (social, sexual, or otherwise) are organized within a social group or society.

Interactionist Theory

A theory that emphasizes that the development of individuals is shaped by the interaction of personal characteristics and the environmental or social context.

Psychological Dynamic

The interplay of various psychological forces or factors that influence behavior and mental states.