Important characteristics of antimicrobic drugs include
A. high toxicity against microbial cells.
B. readily delivered to the site of infection.
C. do not cause serious side effects in humans.
D. remains active in body tissues and fluids.
E. All of these choices are correct.
Answer: E
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If both homologous chromosomes of each pair exist in the same nucleus, that nucleus is
(a) diploid. (b) unable to undergo meiosis. (c) haploid. (d) none of the above.
A researcher tests the hypothesis that large, daily doses of vitamin C help protect against catching the common cold. What would be the best experimental and control group to test this hypothesis?
A. Experimental group: takes a large dose of vitamin C daily; Control group: takes nothing. B. Experimental group: people with a cold are administered vitamin C daily; Control group: people without a cold are not administered vitamin C. C. Experimental group: takes a large dose of vitamin C daily; Control group: takes a large weekly dose of vitamin C. D. Experimental group: takes a large, daily dose of vitamin C; Control group: takes a daily dose of a sugar pill disguised as vitamin C.
Microsporocytes divide by __________ to form __________
a. meiosis; megapores b. mitosis; megaspores c. mitosis; microspores d. meiosis; microspore mother cells e. meiosis; microspores
Which of the following is the CORRECT sequence for stages of Ehrlichia development in infected host cells?
A. initial body, morula, elementary body B. morula, elementary body, initial body C. initial body, elementary body, morula D. elementary body, initial body, morula E. morula, initial body, morula, elementary body