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Biotechnology › ViewWhat happens to lymphocytes that are likely to bind to self-antigens?
A. They mature into B cells
B. They undergo apoptosis
C. They become memory cells
D. They produce antibodies
Diseases of The Body Systems › View
What are the common signs or symptoms of osteoporosis?
A. Bones that break easily
B. Back pain
C. Stooped posture
D. All of the above