Researchers are designing several experiments to test the ability of Salmonella bacteria to develop antibiotic resistance. A culture of Salmonella bacteria is exposed to the same concentrations (200 mg/L) of an antibiotic for four days. The table shows the number of isolated resistant bacteria over a four-day period. Which of the following statements best explains these results?DayNumber of Resistant Bacteria in the Culture152593677432,456The bacteria were not affected by the antibiotic.After being exposed to the antibiotic, the bacteria altered the antibiotic.A new species of bacteria emerged after the antibiotics were introduced.Random mutations led some bacteria to be resistant and, over time, they increased in the population.

Introduction: Salmonella typhi is a genus of rod-shaped bacteria that is responsible for typhoid.…

Answered: Researchers are designing several…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Researchers are designing several experiments to test the ability of Salmonella bacteria to develop antibiotic resistance. A culture of Salmonella bacteria is exposed to the same concentrations (200 mg/L) of an antibiotic for four days. The table shows the number of isolated resistant bacteria over a four-day period. Which of the following statements best explains these results?

Day	Number of Resistant Bacteria in the Culture
1	5
2	59
3	677
4	32,456

The bacteria were not affected by the antibiotic.

After being exposed to the antibiotic, the bacteria altered the antibiotic.

A new species of bacteria emerged after the antibiotics were introduced.

Random mutations led some bacteria to be resistant and, over time, they increased in the population.

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