Hexachlorophene has been particularly effective against
A. Staphylococcus aureus.
B. Micrococcus aureus.
C. Escherichia coli.
D. Enterobacter aerogenes.
A
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Diphtheria is caused by a member of which of the following genera?
A. Propionibacterium B. Mycobacterium C. Corynebacterium D. Nocardia
Which of the following is NOT true regarding
guppies of the species Poecilia reticulata? a. Males are generally smaller than the females. b. Males are more brightly colored than the females. c. Males continue growing after reaching sexual maturity. d. The male’s colors serve as visual signals for mating. e. They have complex mating rituals.
The streamlined shape of the dolphin, seal, and other swimming animals is most important for
A. overcoming the forces of gravity acting on the animal. B. reducing drag from the water they must swim through. C. maintaining a consistent speed in the dense medium. D. reducing the mass of the animal's body.
Which of the following is not found in DNA?
A) uracil B) cytosinne C) adenine D) thymine