| Topics | Subtopics | |
| 1 | Chromosomes, genes and proteins | 1.1 Chromosomes and cell division |
| 1.2 Inheriting genes | ||
| 1.3 Genes and protein synthesis | ||
| 2 | Variation and selection | 2.1 Variation |
| 2.2 Selection | ||
| 3 | Organisms and their environment | 3.1 Energy flow and food webs |
| 3.2 Nutrient cycles | ||
| 3.3 Populations | ||
| 4 | Human influences on ecosystems | 4.1 Human pressures on ecosystems |
| 4.2 Conservation | ||
| 5 | Biotechnology and genetic modification | 5.1 Biotechnology |
| 5.2 Genetic modification |