In This Eight-Year Experiment, 12 Populations of E

question 26

Multiple Choice

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.
-E. coli cells typically make most of their ATP by metabolising glucose. Under the conditions of this experiment, E. coli generation times in the experimental lines and low-glucose conditions should ________.

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

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Definitions:

Reagents

Chemicals or materials introduced into a system to initiate or participate in chemical reactions.

Transformation

A broad term indicating change, in chemistry often referring to the conversion of a compound into another by chemical reaction.

Structure

The arrangement of atoms or molecules in a compound, defining its chemical properties and behavior.

Product

The result of a process or chemical reaction, typically described in the context of what is synthesized or created.