AQA A LEVEL BIOLOGY EXAM. QUESTIONS WITH ANSWERS.
90. What is leftover after the pathogens have been eradicated? 91. What forms the cellular response? 92. What forms the humoral response? 92. What is the primary immune response? 93. Why is the primary response so slow? 94. What do the different memory cells remember? 95. What is the secondary immune response? 96. Why is the secondary immune response quicker? 97. What is in vaccines? 98. What is Herd Immunity? 99. What kinds of antigens can be present in an antigen?
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AQA A LEVEL BIOLOGY
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