Bubonic plague is transmitted by ________.
A. fomites
B. rats
C. fleas
D. sexual contact
E. mosquitoes
Answer: C
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Which of the following is not an amoeba?
A. Entamoeba histolytica B. Cryptosporidium species C. Acanthamoeba species D. Naegleria fowleri
Which cannot be placed in a single trophic level?
a. an oak tree b. a zebra c. a mushroom d. a rabbit e. a lion
Carbon dioxide crosses the plasma membrane by simple diffusion. The rate at which carbon dioxide enters the cell is determined by the
A) amount of energy being produced by the cell. B) amount of transport protein in the membrane. C) concentration of carbon dioxide on each side of the membrane. D) amount of oxygen being exported from the cell. E) amount of carbon dioxide outside of the cell.
The type of microscope in which you would see brightly illuminated specimens against a black background is
A. phase-contrast. B. dark-field. C. bright-field. D. fluorescence. E. electron.