Transfusion reactions are the result of antibody reaction to
A. glycolipids and glycoproteins on the surface of red blood cells.
B. MHC molecules on red blood cells.
C. MHC molecules on white blood cells.
D. plasma proteins.
E. foreign antibodies.
Answer: A
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Which of the following animal groups is entirely aquatic?
A) Mollusca B) Crustacea C) Echinodermata D) Nematoda E) Platyhelminthes
Genes that are situated close on a chromosome
A) do not affect one another. B) do not cross over. C) do not assort independently. D) produces Mendelian ratios for crosses tracking two or more genes.
Which of the following affects the acid-base balance of extracellular fluid?
a. kidneys only b. respiratory system only c. all of the choices d. buffering systems only
The ability to determine an object's location using high frequency sound waves is exhibited by
A. bats flying in darkness. B. owls hunting at night. C. whales and dolphins at sea. D. amphibians underwater.