The Following Questions Refer to Figure 27

question 42

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 is least closely associated with the others?

• A)Hfr cells making use of a sex pilus
• B)rolling circle replication
• C)the "toilet paper" model of replication
• D)conjugation involving an F factor
• E)recombination involving a bacteriophage

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