In birds, the primary lymphoid organ responsible for B-lymphocyte maturation is the:
Correct answer: A. Bursa of Fabricius
- A. Bursa of Fabricius
- B. Spleen
- C. Thymus
- D. Cecal tonsil
Explanation
The bursa of Fabricius is the major site of B-cell development in birds. The thymus supports T-cell maturation, while the spleen and cecal tonsils are mainly secondary lymphoid tissues.
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