Home 9 IGCSE Biology Biology Click on the links below for material to help you master the syllabus topics. Syllabus 1. Characteristics and classification of living organisms 2. Organisation of the organism 3. Movement into and out of cells 4. Biological molecules 5. Enzymes 6. Plant nutrition 7. Human nutrition 8. Transport in plants 9. Transport in animals 10. Diseases and immunity 11. Gas exchange in humans 12. Respiration 13. Excretion in humans 14. Coordination and response 15. Drugs 16. Reproduction 17. Inheritance 18. Variation and selection 19. Organisms and their environment 20. Human influences on ecosystems 21. Biotechnology and genetic modification