Which of the following correctly describes the interactions between antigens, class II MHC molecules and T cells?
A) Antigens bound to class II MHC molecules and interact with helper T cells
B) Antigens bound to class II MHC molecules and interact with killer T cells
C) both a and b
D) neither a nor b
A
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The most important reason why summers in the Southern Hemisphere are not warmer than summers in the Northern Hemisphere is that
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Quartz forms at a lower temperature than olivine
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