On the phase diagram, conditions of pressure and temperature, at which two phases coexist in equilibrium are separated by a line.
This
is a specific response because in order to fight antigens, white blood cells,
the most important cells of the immune system, must produce large, Y-shaped
proteins known as antibodies to fight these invaders. This is a type of
specific defense (as I have identified antibodies as specific defenses is the
chart above).
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I'm not too sure which one of these two but its either A or C
