Quaternary ammonium compounds ("quats") are used for
A. antisepsis.
B. disinfection.
C. sterilization.
D. quantifying antimicrobial activity.
E. both antisepsis and disinfection.
Answer: E
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A. use heat to force the dye into cell structures B. are differential stains C. use a negative stain technique D. are used on a wet mount of the specimen E. have outcomes based on cell wall differences
What are the ecological consequences of acidification of rain and oceans?
A. They improve the health of ecosystems. B. Acid rain damages ecosystems, but ocean acidification improves the health of oceans. C. They damage the health of ecosystems. D. They do not have any consequences on ecosystems.
The possibility of an abscess should be considered if this bacterial group is isolated in the blood:
a. Clostridium septicum. b. Bacteroides fragilis. c. Streptococcus anginosus. d. Aeromonas hydrophila.
The great apes and first hominids arose from a common ancestor approximately ____ years ago
a. 100,000 b. 1 million c. 3 million d. 5 million e. 7 million