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

---

Definitions:

Drive

The motivation or determination to achieve something, often used in the context of personal or professional goals.

Persuasive Business Messages

Communications designed to influence the thoughts or actions of others in a business context, often aiming to promote products, services, or ideas.

Requests for Action

Calls for specific actions to be taken by individuals or groups, often found in formal communications.

Demographic Information

Data related to the characteristics of a population or a particular group within it, such as age, gender, income, and education.