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The balance in your checkbook is -$39. If you make a deposit of $81, and then write a check for $11, what is the new balance? $ __________
Pre-B Cells
Immature B cells undergoing maturation in the bone marrow, important for the adaptive immune system.
Negative Selection
A process in immunology where self-reactive T or B cells are eliminated during development, preventing autoimmune diseases.
Positive Selection
A process in the immune system whereby cells that recognize a foreign antigen with high affinity are selectively proliferated.
Cold
A decrease in temperature, or a viral infection causing symptoms like runny nose, coughing, and sore throat.
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