Biology: Cambridge O Level, IGCSE, AS & A Level
Cambridge O Level, IGCSE and A Level biology, from cells to ecosystems.
Every topic follows the official Cambridge syllabus, one lesson per syllabus section: AI teacher explanations, worked examples, diagrams, common mistakes and exam-style questions, plus practice papers marked against the mark scheme.
O Level
O Level Biology (5090)
- 24.1 Characteristics and Classification of Living Organisms — 4 lessons
- 24.2 Organisation of the Organism — 2 lessons
- 24.3 Movement into and out of Cells — 3 lessons
- 24.4 Biological Molecules — 1 lesson
- 24.5 Enzymes — 1 lesson
- 24.6 Plant Nutrition — 3 lessons
- 24.7 Human Nutrition — 5 lessons
- 24.8 Transport in Plants — 4 lessons
- 24.9 Transport in Animals — 4 lessons
- 24.10 Diseases and Immunity — 1 lesson
- 24.11 Gas Exchange in Humans — 1 lesson
- 24.12 Respiration — 3 lessons
- 24.13 Excretion in Humans — 1 lesson
- 24.14 Coordination and Response — 5 lessons
- 24.15 Drugs — 1 lesson
- 24.16 Reproduction — 5 lessons
- 24.17 Inheritance — 4 lessons
- 24.18 Variation and Selection — 3 lessons
- 24.19 Organisms and their Environment — 4 lessons
- 24.20 Human Influences on Ecosystems — 4 lessons
- 24.21 Biotechnology and Genetic Modification — 1 lesson
IGCSE
IGCSE Biology (0610)
- 25.1 Characteristics and Classification of Living Organisms — 4 lessons
- 25.2 Organisation of the Organism — 2 lessons
- 25.3 Movement into and out of Cells — 3 lessons
- 25.4 Biological Molecules — 1 lesson
- 25.5 Enzymes — 1 lesson
- 25.6 Plant Nutrition — 3 lessons
- 25.7 Human Nutrition — 5 lessons
- 25.8 Transport in Plants — 4 lessons
- 25.9 Transport in Animals — 4 lessons
- 25.10 Diseases and Immunity — 1 lesson
- 25.11 Gas Exchange in Humans — 1 lesson
- 25.12 Respiration — 3 lessons
- 25.13 Excretion in Humans — 1 lesson
- 25.14 Coordination and Response — 5 lessons
- 25.15 Drugs — 1 lesson
- 25.16 Reproduction — 5 lessons
- 25.17 Inheritance — 4 lessons
- 25.18 Variation and Selection — 3 lessons
- 25.19 Organisms and their Environment — 4 lessons
- 25.20 Human Influences on Ecosystems — 4 lessons
- 25.21 Biotechnology and Genetic Modification — 1 lesson
AS & A Level
AS & A Level Biology (9700)
- 26.1 Cell structure — 2 lessons
- 26.2 Biological molecules — 4 lessons
- 26.3 Enzymes — 2 lessons
- 26.4 Cell membranes and transport — 2 lessons
- 26.5 The mitotic cell cycle — 2 lessons
- 26.6 Nucleic acids and protein synthesis — 2 lessons
- 26.7 Transport in plants — 2 lessons
- 26.8 Transport in mammals — 3 lessons
- 26.9 Gas exchange — 1 lesson
- 26.10 Infectious diseases — 2 lessons
- 26.11 Immunity — 2 lessons
- 27.12 Energy and respiration — 2 lessons
- 27.13 Photosynthesis — 2 lessons
- 27.14 Homeostasis — 2 lessons
- 27.15 Control and coordination — 2 lessons
- 27.16 Inheritance — 3 lessons
- 27.17 Selection and evolution — 3 lessons
- 27.18 Classification, biodiversity and conservation — 3 lessons
- 27.19 Genetic technology — 3 lessons