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# 3.2.1 Cell and Metabolism - 3.2.1 Cell and Metabolism # 3.2.2 Human Biology - 3.2.2.1 Body Structure and Movement - 3.2.2.2 Nutrition and Digestion - 3.2.2.3 Respiration, Blood and Circulatory System - 3.2.2.4 Reproduction and Development - 3.2.2.5 Information Systems - 3.2.2.6 Immunobiology # 3.2.3 Ecology - 3.2.3 Ecology