Plasma cells usually live for about one
A) week.
B) month.
C) year.
D) decade.
Answer: A
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Viruses come in several shapes. All of the following are shapes of viruses EXCEPT:
A. head and tail. B. triangular. C. icosahedral. D. helical. E. spiral.
What is true about the operation of gills in water? Check all that apply.
_____ Water can support delicate gill structures. _____ Most bony fish actively pump water over their gills. _____ Keeping membranes moist does not require a separate mechanism. _____ Water carries more oxygen than air, so gills must be more efficient than lungs. _____ Gills have evolved many times. _____ Gills take different forms in different animals.
In order to prevent the onset of hemolytic disease of the newborn, an Rh- woman who is pregnant with an Rh+ child can be given ________ during pregnancy
Fill in the blank(s) with correct word
Immune complex reactions belong to which class of hypersensitivity reactions?
A) type I B) type II C) type III D) type IV E) type V