(a)[2]
Finish Table 5.1.
(b)[1]
State where the blood cell labelled X originates from.
(c(i))[2]
Suggest how phagocytes are able to distinguish healthy body cells from cancerous tumour cells.
(c(ii))[2]
Briefly outline how a tumour is formed.
Biology 9700 · AS & A Level · The immune system
The immune system — practice question
Natural immunity and artificial immunity may each be acquired in either a passive or an active way. Table 5.1 presents details of the immunity acquired by two individuals, P and Q.
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