Practise IB Diploma Programme Biology at Higher Level for the course first assessed in 2025. HL uses the same four organizing themes as SL—unity and diversity, form and function,…
HL covers the shared Biology framework with additional higher-level depth and syllabus statements. The course therefore expects a greater body of biological knowledge, understanding and skills than SL.
The external assessment uses Paper 1A multiple-choice questions, Paper 1B data-based questions and Paper 2 short-answer and extended-response questions. HL papers assess both shared and additional higher-level content.
The course is organized through unity and diversity, form and function, interaction and interdependence, and continuity and change, viewed across molecules, cells, organisms and ecosystems.
Choose an HL topic or syllabus statement, attempt the question before opening the answer, then check precise terminology, evidence, data interpretation and linked reasoning against the available mark-scheme points.