IB Biology is a Group 4 subject in the International Baccalaureate Diploma Programme (IBDP). It explores four interconnected themes: Unity and Diversity, Form and Function, Interaction and Interdependence, and Continuity and Change, with a strong focus on experimental work, scientific inquiry, data analysis, and practical investigation skills.
The course is available at Standard Level (SL, 150 teaching hours) and Higher Level (HL, 240 teaching hours), with first assessment in 2025.
| Assessment | Format | SL | HL | Weighting |
|---|---|---|---|---|
| Paper 1 | Multiple-choice and data-based questions | 1 hour 20 min | 2 hours | 36% |
| Paper 2 | Short and extended response questions | 1 hour 30 min | 2 hours 30 min | 44% |
| Scientific Investigation | Individual research project | 10 hours | 10 hours | 20% |
Textbooks
Comprehensive notes with diagrams and examples
623 chapters
Videos
Master each concept with an explainer video
551 videos
Lessons
Step-by-step lessons and quizzes
595 lessons
Flashcards
Learn key concepts with active recall
1166 flashcard decks
Cheatsheets
Chapter summaries, key concepts, and exam tips
40 cheatsheets
Key Definitions
Essential terms and concepts explained
Develop conceptual understanding that allows connections to be made between different areas of the subject, and to other DP sciences subjects
Acquire and apply a body of knowledge, methods, tools and techniques that characterize science
Develop the ability to analyse, evaluate and synthesize scientific information and claims
