Biologia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)
Which cell can provide an innate defence by engulfing microbes without first selecting a clone with a matching antigen receptor? A. A plasma cell secreting one antibody specificity B. A memory B cell C. An activated helper T cell D. A macrophage
Biologia IBPaper 2, maj 2022, TZ1wzorowane16 pktotwarteśrednie (szac.)
Plant energy capture and animal cell functions support life. (a) Outline reasons for using stem cells therapeutically. (b) Describe how leaf cells use light energy. (c) Explain how cells and cell components in blood protect against infectious disease.