A DNA plasmid encoding a protein antigen from West Nile virus is injected into muscle cells of a horse. This is an example of a(n)
A) subunit vaccine.
B) conjugated vaccine.
C) nucleic acid vaccine.
D) attenuated whole-agent vaccine.
E) live whole-agent vaccine.
Ans: C) nucleic acid vaccine.
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The binomial system of nomenclature assigns each organism a scientific name consisting of
A. genus and species. B. kingdom and species. C. kingdom and genus. D. species and strain.
What is the most common cause of anorexia-related death?
a. cancer c. pneumonia b. cardiac arrest d. stroke
How many hydrogen bonds can a water molecule form?
A. 1 B. 2 C. 3 D. 4 E. 5
Which statement best describes extracellular digestion?
a. Extracellular digestion is seen in sponges. b. Extracellular digestion occurs in most animals. c. Extracellular digestion must involve choanocytes. d. Extracellular digestion may take place in a tube contained inside the body.