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

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Definitions:

ADHD

Attention-Deficit/Hyperactivity Disorder, a neurodevelopmental disorder characterized by persistent patterns of inattention, hyperactivity, and impulsivity.

Brain Chemistry

The complex interplay of chemicals and neurotransmitters in the brain that affects mood, behavior, and cognitive functions.

Disorders

Conditions characterized by disruption of normal functioning in the body or mind, often leading to distress or impaired ability.

ADHD

Attention Deficit Hyperactivity Disorder, a neurodevelopmental disorder characterized by patterns of hyperactivity, impulsivity, and/or inattention.