Last summer a bee stung you for the first time. You developed only a small area of redness and swelling at the site. However, if you are stung again and have a severe reaction that occurs more rapidly, you know that this is due to the activation of
A) memory cells.
B) complement.
C) cytotoxic T cells.
D) helper T cells.
E) tissue macrophages.
A
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An example of a carbohydrate is
A. C7H14O7. B. C7H12O7. C. C7H14O28. D. C7H7O7.
Which species concept is based on the degree of reproductive isolation between populations of species?
a) Phylogenetic Species Concept b) Recognition Species Concept c) Morphological Species Concept d) Biological Species Concept e) Ecological Species Concept
Which one of the following diseases is closely related to and clinically indistinguishable from rabies?
a) Eastern equine encephalitis b) West Nile virus c) Polio d) European bat lyssavirus
Which theory states that business power is counterbalanced, restricted, controlled, and subject to defeat?
A) The Marxist theory B) The pluralist theory C) The dominance theory D) The state autonomy theory