A Scientist Works with a Particular Strain of Bacteria

question 141

Short Answer

A scientist works with a particular strain of bacteria.Sometime after a cross-contamination event in the lab, she finds that her bacteria have now acquired antibiotic resistance.She concludes that the strains have undergone _______.

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Definitions:

Just Noticeable Difference (Jnd)

The least alteration in a stimulus that is just noticeable by an organism.

Absolute Threshold

The minimum stimulus intensity required for detection by a sense organ, signifying the point at which a stimulus becomes perceptible to the senses.

Noticeable Threshold

A threshold is the level at which a stimulus becomes sufficiently strong to produce a discernible effect or reaction.

Range Threshold

The minimum and maximum values within which a particular sensory stimulus, action, or phenomenon is perceptible or has an effect.