It covers the three external Achievement Standards: Biology 2.4 Demonstrate understanding of life processes at the cellular level Biology 2.5 Demonstrate understanding of genetic variation and change Biology 2.7 Demonstrate understanding of gene expression This workbook has brief exam revision notes for end-of-year study, with examples and NCEA exam questions from 2022 and earlier years. Full answers with explanations and A, M, and E grades are given. Use this workbook all year round or during Terms 3 and 4 to revise and practise exam questions.