题目内容

In which type of symbiosis does one member get benefit from itshost, causing harm to another member. ?

A. Mutualism
B. parasitism
C. commensalism
D. all above.

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Which of the following is false concerning microbial contaminants?

A. Contaminants may become opportunistic pathogens.
B. Most microbial contaminants will eventually cause harm.
Contaminants may be a part of the transient microbiota.
D. Contaminants may be introduced by a mosquito bite.

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The process by which microorganisms attach themselves to hostcells is _____________.

A. Infection
B. contamination
C. disease
D. adhesion

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In which type of symbiosis do both members benefit from theirinteraction?

A. Mutualism
B. parasitism
C. commensalism
D. all above.

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When pathogenic bacteria lose the ability to make adhesins owing to insertion of Tn5 into the gene of pili, they typically ________________.

A. become avirulent
B. produce modified enzyme to break kanamycine
C. Produce endotoxin
D. decrease in virulence

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In which type of symbiosis does one member get benefit from itshost, causing harm to another member. ?

A. Mutualism B. parasitism C. commensalism D. all above.

Which of the following is false concerning microbial contaminants?

The process by which microorganisms attach themselves to hostcells is _____________.

In which type of symbiosis do both members benefit from theirinteraction?

When pathogenic bacteria lose the ability to make adhesins owing to insertion of Tn5 into the gene of pili, they typically ________________.

A. Mutualism
B. parasitism
C. commensalism
D. all above.