Answered: The results of the fluctuation test…

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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The results of the fluctuation test (Fig. 7.5) were interpreted to mean that different numbers of mutant
bacteria preexisted in each of the 11 culture tubes because the mutations arose spontaneously at different
times during the growth of each culture. However, another possibility is that the differences in the number
of colonies on the plates are simply due to differences
in the ability of the petri plates to support the growth
of colonies. For example, perhaps the selective agent
or the nutrients in the media were not evenly distributed in the molten agar poured into the petri dishes.
What experiment could you do to determine whether
or not differences in the petri plates were a factor in
the experiment?

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