The graph shows the primary and secondary responses of the immune system to antigens.
What are responses X and Y?
1 )
(X) primary response (Y) secondary response caused by cloning of B–lymphocytes formed during the primary response
2 )
(X) primary response (Y) secondary response caused by cloning of T–lymphocytes formed during the primary response
(X) secondary response caused by cloning of B–lymphocytes formed during theprimary response (Y) primary response
4 )
(X) secondary response caused by cloning of T–lymphocytes formed during theprimary response (Y) primary response
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