Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?
A. it is inexpensive.
B. it is stable during storage.
C. it is harmless to humans.
D. it only arrests growth of vegetative cells.
E. it acts quickly.
Answer: D
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Whether an organism is classified as a photoheterotroph or a photoautotroph depends on its
A) energy source. B) carbon source. C) oxygen requirements. D) carbon and energy sources.
Which one of the following traits would be found in a typical fern but not a moss?
A. homospory B. tracheids C. gametophytes with rhizoids D. antheridia E. a sporophyte generation
The tendency of water molecules to form hydrogen bonds is
A. evaporation. B. hydrolysis. C. cohesion. D. condensation. E. adhesion.
Bacterial biofilms are important medically because:
a. They may form on catheters b. They are resistant to treatment with antibiotics c. They can form dental plaque d. They are resistant to immune defenses e. All are correct