Epidemic typhus, spread by lice, is caused by
A. Chlamydophila pneumonia.
B. Chlamydophila psittaci.
C. Ehrlichia caffeensis.
D. Rickettsia prowazekii.
E. Rickettsia typhi.
Answer: D
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All of the following are reverse transcriptase inhibitors used to treat HIV infection EXCEPT
A. didanosine. B. azidothymidine. C. lamivudine. D. acyclovir. E. zalcitabine.
Which of the following best describes the factors determining water potential of plant cells?
A. solute outside the cell B. solute inside the cell C. cell turgor pressure D. pressure at the cell wall-membrane interface E. All of these are true
In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and a muscular ____ that is used in locomotion.
Fill in the blank(s) with the appropriate word(s).
Chromosomes are located on genes.
a. true b. false