The main factors believed to influence bacterial resistance are
A. the rate of bacteria growth, and poor hand washing practices.
B. the frequency of resistant genes among bacteria, and antibiotic overuse.
C. overuse of antibiotics, and human evolutionary changes.
D. poor hand washing, and frequency of resistance genes among bacteria.
Answer: B
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In a given species, when chemical carcinogens cause histologically identical tumors, these
tumors can A) possess completely different tumor antigens. B) possess the same tumor antigens. C) be successfully transplanted between members of the same species. D) A and B. E) B and C.
FDA guidelines suggest that a safe level of caffeine in beverages is how many milligrams per 12 ounces?
A. 62 mg B. 72 mg C. 82 mg D. 92 mg
A long-term smoker who develops a chronic cough, attends a clinic, and subsequently quits smoking is an example of
A. primary prevention. B. secondary prevention. C. both a and b. D. tertiary prevention.
The interaction of two or more drugs in which the effects of the individual drugs are compounded or multiplied is
A) antagonism. B) synergism. C) intolerance. D) cross-tolerance.