The domain that contains unicellular organisms that live in extreme environments is

a. eubacteria
b. eukarya
c. archaea
d. bacteria


Ans: c. archaea

Biology & Microbiology

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The organism most frequently associated with various infections in humans is:

a. Bordetella. b. Oligella. c. Achromobacter. d. Roseomonas.

Biology & Microbiology

Bacteria that resist killing by complement proteins are termed

A. carriers. B. serum resistant. C. balanced pathogens. D. mutualistic. E. carriers AND serum resistant.

Biology & Microbiology

Horses and donkeys can breed and produce sterile offspring known as mules. Horses and donkeys remain separate species because of this hybrid sterility, which is:

A. an allopatric barrier to reproduction. B. a sympatric barrier to reproduction. C. a prezygotic barrier to reproduction. D. a postzygotic barrier to reproduction.

Biology & Microbiology

True/False: A drug with high selective toxicity would likely have a low therapeutic index.

What will be an ideal response?

Biology & Microbiology