4.3.1 Communicable diseases – Part 1 (Biology only)

4.3.1 Communicable diseases – Part 2

4.3.1 Communicable diseases – Part 3

4.4.1 Photosynthesis

4.4.2 Respiration

4.5.1 Homeostasis

4.5.2 The human nervous system – Part 1: Structure and function (Biology only)

4.5.2 The human nervous system – Part 2: The brain, the eye and control of body temperature (Biology only)

4.5.3 Hormonal coordination in humans – Part 1 (Biology only)

4.5.3 Hormonal coordination in humans – Part 2

4.5.4 Plant Hormones (Biology Only)

4.6.1 Reproduction – Part 1: Sexual and Asexual reproduction (Biology only)

4.6.1 Reproduction – Part 2: DNA, the genome and inheritance (Biology only)

4.6.2 Variation and Evolution – Part 1: Variation and Evolution

4.6.2 Variation and Evolution – Part 2: Selective breeding, Genetic engineering and Cloning (Biology only)

4.6.3 The development of understanding of genetics and evolution – Part 1: Theory of evolution, Speciation and The understanding of genetics (Biology Only)

4.6.3 The development of understanding of genetics and evolution – Part 2: Evidence for evolution, Fossils, Extinction and Resistant bacteria (Biology only)

4.6.4 Classification of living organisms

4.7.1 Adaptations, interdependence and competition

4.7.2 Organisation of an ecosystem (Biology only)

4.7.3 Biodiversity and the effect of human interaction on ecosystems

4.7.4 Trophic levels in an ecosystem (Biology only)

4.7.5 Food production (Biology only)