The Following Questions Refer to Figure 27.1

question 23

Multiple Choice

The following questions refer to Figure 27.1.
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.

Figure 27.1
-If new genetic variation in the experimental populations arose solely by spontaneous mutations, then the most effective process for subsequently increasing the prevalence of the beneficial mutations in the population over the course of generations is

• A) transduction.
• B) binary fission.
• C) conjugation.
• D) transformation.
• E) meiosis.

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Definitions:

Fresh Water

Fresh water is water with a low salt concentration, found in rivers, lakes, streams, and underground aquifers, essential for drinking, agriculture, and industry.

Scarce Resource

A resource that is limited in availability and can be used up or depleted, making it valuable and subject to economic study for optimal use.

Unlimited Wants

The economic concept that humans have endless desires for goods and services.

Good

A tangible product used to satisfy human wants.