A culture medium consisting of agar, peptone, and beef heart, which are substances in which the amount of ingredients are unspecified, is a
a. chemically defined medium.
b. complex medium.
c. selective medium.
d. differential medium.
e. reducing medium.
Ans: b. complex medium.
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The process of killing or removing all of the microorganisms in or on a material is termed
A. sterilization. B. disinfection. C. sanitation. D. antisepsis.
Enveloped viruses
A. just require a stamp. B. have an outer lipid bilayer membrane containing various proteins. C. are surrounded by an additional layer of carbohydrate. D. envelope a cell.
Atherosclerosis is a pathophysiological process resulting from the
A. accumulation of plaque in blood vessels. B. reduced arterial resistance. C. elevated vasodilation in the limbs. D. chronic myocardial infarction. E. coronary artery bypass.
Which of the following plant hormones was studied in the 1880s by Charles and Francis Darwin in experiments on phototropism?
A. abscisic acid B. ethylene C. cytokinin D. auxin E. gibberellin