Anaphylactic shock ____
a. involves IgG antibodies rather than IgE antibodies
b. can occur the first time an individual is exposed to an allergen
c. involves the release of antihistamine from mast cells
d. results from HIV infection
e. is a life-threatening condition resulting from severe inflammation
ANSWER: e
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The secondary structure of proteins may take the
form of a. twists. b. bends. c. loops. d. folds. e. all of these.
The Enterobacteriaceae do not produce oxidase compared to the pseudomonads that do produce oxidase.
a. true b. false
As the carrying capacity of an environment is approached by a population,
A. deaths begin to exceed births. B. density-dependent environmental resistance increases. C. population growth begins to be exponential. D. births begin to exceed deaths. E. the rate of reproduction increases.
In a seed plant, the pollen grains are actually tiny
A. male gametophytes. B. eggs. C. seeds. D. female gametophytes.