In antibody-mediated immunity, what happens immediately after B cells are activated?
a. The foreign antigen-MHC complex is displayed on the cell surfaces.
b. Activated T helper cells interact with the B cells.
c. The B cells are cloned.
d. Antibodies combine with antigens on the pathogen surface.
e. The B cells becomes plasma cells.
c
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A. Amphibians B. Birds C. Fishes D. Mammals E. Reptiles
Which one of the following organisms in not one of the four most likely potential biologic warfare or bioterrorism agents?
A) Bacillus anthracis B) Ebola virus C) Variola major D) Yersinia pestis
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a. ten times more b. ten times less c. about the same number of d. about half as many e. 100 times more
A community consists of ____ species in a given area
a. one b. two c. three d. four e. all