The domain that contains unicellular organisms that live in extreme environments is
a. eubacteria
b. eukarya
c. archaea
d. bacteria
Ans: c. archaea
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The organism most frequently associated with various infections in humans is:
a. Bordetella. b. Oligella. c. Achromobacter. d. Roseomonas.
Bacteria that resist killing by complement proteins are termed
A. carriers. B. serum resistant. C. balanced pathogens. D. mutualistic. E. carriers AND serum resistant.
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.
True/False: A drug with high selective toxicity would likely have a low therapeutic index.
What will be an ideal response?