Shared features of b and t lymphocyte function include: ?
(a) specificity of receptors
(b) diversity of receptors
(c) regulation of activation
(d) memory(e) all above

Your right answer is A. Specificity of receptors

I hope this information helps you :)! 

Linnaeus divided nature into three kingdoms: animals, vegetable (or plant),  and minerals. The animal and plant kingdoms were further divided into  smaller, more inclusive categories based on physical characteristics.  As time passed, and knowledge increased, other scientists added to  Linnaeus’ original system.

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