| Chapter 26 Basic genetics | | |
| Chapter 26 Basic genetics (2021 new questions) | | |
| Chapter 27 Molecular genetics | | |
| Chapter 27 Molecular genetics (2021 new questions) | | |
| Chapter 28 Biotechnology | | |
| Chapter 28 Biotechnology (2021 new questions) | | |
| Integrated Quiz 9 (Book 4: Chapters 26–28) | | |
| Chapter 29 Biodiversity | | |
| Chapter 29 Biodiversity (2021 new questions) | | |
| Chapter 30 Origins of life and the evidence for evolution | | |
| Chapter 30 Origins of life and the evidence for evolution (2021 new questions) | | |
| Chapter 31 Mechanisms of evolution and speciation | | |
| Chapter 31 Mechanisms of evolution and speciation (2021 new questions) | | |
| Integrated Quiz 10 (Book 4: Chapters 29–31) | | |