IB skill practice

Analyse immunity and disease response

Syllabus-aligned Biology HL systems, ecology, and investigation skill with approved production seeds.

Paper 1, Paper 2 5 marks Difficulty 4

Analyse primary and secondary response

An antibody graph in a Auckland HL data-response class shows a faster higher antibody concentration after a second exposure to the same antigen. Explain the immune basis. Use the labelled diagram, data, or experimental evidence before writing the answer. Enter the answer and choose the interpretation that best matches the HL Biology evidence.

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