Red imported fire ants (RIFAs) disrupt natural communities by ____
a. congregating inside electrical equipment
b. competing with native ant populations
c. stinging humans with deadly venom
d. disrupting pasture land
e. killing Texas horned lizards
ANSWER: b
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Which of the following is NOT a morphogen?
A. activin B. noggin C. Wnt D. cadherin E. protein produced by Spemann's organizer (dorsal lip of a gastrula)
A researcher is attempting to determine the prevalence of asymptomatic human infection with West Nile virus in New York City. Which of the following would be most useful?
A. Detection of IgG against WNV B. Viral culture in embryonated eggs C. Detection of IgM against WNV D. Tissue culture E. Electron microscopy
The reported effects of toxins on marine zooplankton include
a. increased sinking rate. b. faster growth. c. tumors. d. altered growth and development. e. increase in photosynthetic rates.
A type of symbiosis in which one member of the relationship benefits with no effect on the other is
A. parasitism. B. mutualism. C. commensalism. D. predation. E. intraspecific competition.