How is active immunity different from passive immunity?
a. Active immunity is slower in onset and shorter-lived.
b. Active immunity is slower in onset and longer-lived.
c. Active immunity is faster in onset and shorter-lived.
d. Active immunity is faster in onset and longer-lived.
e. Only active immunity involves antibodies.
B
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Which process produces a gaseous product that can be used as fuel to provide heat or power for a wastewater treatment plant?
A) trickling filter secondary wastewater treatment B) aerobic secondary wastewater treatment C) anaerobic secondary wastewater treatment D) primary wastewater treatment
Type I hypersensitivity is caused by the release of vasoactive products from mast cells coated with
A) IgA. B) IgE. C) IgG. D) IgM.
Motor signals are also referred to as
a. efferent. b. motor. c. reverberating. d. saltatory. e. afferent.
The main nitrogenous waste excreted by terrestrial amphibians and mammals is
A. uric acid. B. ammonia. C. urea. D. amino acid. E. uracil.