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Home Q & A Board Biology-Related Homework Help Medicine Immunology
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Lesley0479 Lesley0479
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6 years ago
Positive selection occurs when
 
  a. cells become positive for either CD4 or CD8 by recognizing either the MHC class I or class II molecule
  b. cells that recognize self-antigens are allowed to live
  c. cells that recognize self-antigens undergo apoptosis
  d. none of the above
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KaydinceKaydince
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6 years ago
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Lesley0479 Author
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6 years ago
This helped my grade so much Perfect
amandamraz
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You make an excellent tutor!
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2 hours ago
Just got PERFECT on my quiz
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