Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 30, Problem 8TY
Summary Introduction
Introduction: A microbiome is an environment in which many species of microbes with their genes are assembled together to benefit the particular organism. A microbiome is not only limited to the human body but it is also a part of the animal and plant body.
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which of the following is not a way that normal microbial prevent growth of competing microbes?
a. production of substances harmful to competitors
b. more efficient utilization of nutrients
c. changing pH of environment
d. all of the above are used by normal microbiota against competitors
e. none of the above are utilized by normal microbiota
A bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining?
Group of answer choices
A. fimbriae
B. pili
C. an endospore
D. a flagellum
Why are Pseudomonas aeruginosa infections difficult to treat?
A. Because they form biofilms, which are difficult for antibiotics to penetrate.
B. Because they have a special endotoxin that degrades many antibiotics.
C. Because we do not have any antibiotics that target P. aeruginosa.
D. Because they are gram-positive bacteria, which are harder to treat.
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