The Following Question Refers to the Figure

question 5

Multiple Choice

The following question refers to the figure.
In this eight-year experiment, a population of E. coli, begun from a single cell, was 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 population, and its ability to survive in low-glucose conditions was tested against that of members sampled from the ancestral E. coli population.
E.coli cells typically make most of their ATP by metabolizing glucose. Under the conditions of this experiment, how would E. coli generation times in the experimental lines and low-glucose conditions be described?

• A) they will be the same as in the typical environment
• B) they will be faster than in the typical environment
• C) they will be slower than in the typical environment
• D) they will increase over time in the experimental cells

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