Biology: every topic explained
30 short explanations for Biology, one per syllabus topic: the idea, the rules, the common mistake and a worked example. Each one links to our notes and a free test on that topic.
Cell biology
- Cell structure and specialisation
- Microscopy and culturing microorganisms
- Cell division
- Transport in cells
Organisation
- Organisation and the digestive system
- The heart, blood vessels and blood
- Coronary heart disease and non-communicable diseases
- Plant tissues, organs and organ systems
Infection and response
- Communicable diseases
- Human defence systems and vaccination
- Antibiotics, painkillers and drug development
- Monoclonal antibodies and plant disease
Bioenergetics
Homeostasis and response
- Homeostasis and the nervous system
- The brain, the eye and body temperature control
- The endocrine system and blood glucose control
- Maintaining water and nitrogen balance
- Hormones in reproduction and negative feedback
- Plant hormones
Inheritance, variation and evolution
- Reproduction, meiosis and DNA
- Genetic inheritance, inherited disorders and sex determination
- Variation, evolution and genetic technologies
- The development of understanding of genetics and evolution
- Classification of living organisms
Ecology
- Adaptations, interdependence and competition
- Organisation of an ecosystem
- Biodiversity and the effect of human interaction on ecosystems
- Trophic levels in an ecosystem
- Food production
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