Our IB Diploma Programme Biology notes, written to the current syllabus (first exams 2025), 48 PDF files and 592 pages:
- Theme A (Unity and Diversity): 9 topic notes, 1 worksheet and its mark scheme
- Theme B (Form and Function): 10 topic notes, 1 worksheet and its mark scheme
- Theme C (Interaction and Interdependence): 9 topic notes, 1 worksheet and its mark scheme
- Theme D (Continuity and Change): 12 topic notes, 1 worksheet and its mark scheme
- HL-only topics are marked HL in the file titles
- 4 printable practice sets from the Mega Lecture question bank: questions first, answers and explanations at the end (the same questions you can practise online)
Written by the Mega Lecture team. Zip files with a README index; for personal study. Everything in it stays free to read online on the notes page.




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