In This Eight-Year Experiment, 12 Populations of E

question 71

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.
-If the vertical axis of the figure above refers to relative fitness, then which of the following is the most valid and accurate measure of fitness?

• A) number of daughter cells produced per mother cell per generation
• B) average swimming speed of cells through the growth medium
• C) amount of glucose synthesised per unit time
• D) number of generations per unit time

---

Definitions:

Process Cost Accounting

An accounting method used to track production costs by processing departments or units, suitable for industries where products are indistinguishable from each other, such as chemicals.