1. Revision videos in order

2. Nerves and Hormones
Nervous system Reflex 1 Control in the human body The menstrual cycle Hormones to control fertility Plant Hormones

3. Keeping healthy
Healthy diet Exercise and health Pathogens and the immune system Vaccination Semmelweiss Antibiotics Antibiotic resistance Culturing Microorganisms

4. Drugs Drug testing Thalidomide
Recreational and performance enhancing drugs

5. Competition and adaptation
Arctic adaptations
Desert animal adaptations
Desert plant adaptations
Environmental change

6. Energy transfer and the carbon cycle
Energy and biomass
Decomposition
The carbon cycle

7. Genetics and evolution
Chromosomes, genes and DNA
Sexual and asexual reproduction
Cloning plants
Cloning animals by embryo transplant
Adult cell cloning
Genetically modified organisms
Genetically modified crops
Natural selection