The Following Question Refers to the Figure

question 70

Multiple Choice

The following question refers to the figure.
In this eight-year experiment, 12 populations of E. coli, each begun from a single cell, were grown in low-glucose conditions for 20,000 generations. Each culture was introduced to fresh growth medium every 24 hours. Occasionally, samples were removed from the populations, and their fitness in low-glucose conditions was tested against that of members sampled from the ancestral (common ancestor) E. coli population.

Which term best describes what has occurred among the experimental populations of cells over this eight-year period?

• A) microevolution
• B) speciation
• C) adaptive radiation
• D) stabilizing selection

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Definitions:

Negative Affectivity

A personality trait characterized by the tendency to experience negative emotions and moods, such as anger, sadness, or guilt, more frequently and intensely than others.

Boundary Role

involves positions within an organization that require interaction with external environments, serving as a bridge between the internal operations and the outside world.

Occupational Stress

Describes the stress experienced by individuals due to job-related factors, including workload, work environment, or work-life balance issues.

Coping Strategies

Techniques or methods used by individuals to manage stress, challenges, or adverse situations.