Biology: every topic explained
52 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.
Cells
Classification
Movement into and out of cells
Biological molecules
Enzymes
Plant nutrition
Transport in flowering plants
Human nutrition
Human gas exchange
Respiration
Transport in humans
Disease and immunity
Excretion
Coordination and control
- Mammalian nervous system
- Mammalian sense organs
- Mammalian hormones
- Homeostasis
- Temperature control
- Blood glucose control
Coordination and response in plants
Development of organisms and continuity of life
- Nuclear division
- Asexual and sexual reproduction
- Sexual reproduction in plants
- Sexual reproduction in humans
Inheritance
Biotechnology and genetic modification
Relationships of organisms with one another and with the environment
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