The Following Questions Refer to Figure 27

question 77

Multiple Choice

The following questions refer to Figure 27.1 below, which is the same as Figure 27.10 in the textbook.
In this 8-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.

Figure 27.1
-Which term best describes what has occurred among the experimental populations of cells over this 8-year period?

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

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Pull Quote

A significant or attention-grabbing quote or excerpt pulled from a document or story to highlight and attract readers.

Proximity

The closeness or physical distance between people, objects, or geographical locations.

Basic Principles

Fundamental truths or propositions that serve as the foundation for a system of belief or behavior or for a chain of reasoning.

Overall Design

Refers to the comprehensive plan or blueprint for a project or system, addressing aspects such as structure, layout, and aesthetics.