IGCSE Biology topic guides

One page per topic: the ideas it tests, the mistakes that cost marks, and an exam-style question worked through step by step.

Topics

• The kidney and excretionExcretion in humans
• Structure and function of the heartTransport in animals
• Calculating means, changes and ratesRecording and processing data
• Reading a value from a graphGraphs
• Controlling variables for a fair testVariables and planning
• Transpiration and factors affecting itTransport in plants
• Carrying out food testsEvaluation and techniques
• Homeostasis (temperature and glucose)Coordination and response