IB Biology: Format & Free Practice
IB Biology (first assessment 2025) is organized around four themes — unity and diversity, form and function, interaction and interdependence, and continuity and change — studied at the molecular through ecosystem levels. Here's how it's assessed, with free COSMIQ practice.
COSMIQ prepares you for the IB Biology and administers realistic full-length mock tests — it does not administer the official test.
Frequently asked
How is IB Biology assessed?
Externally through Paper 1 (multiple-choice and data-based questions) and Paper 2 (data-based and extended-response questions), and internally through the Scientific Investigation.
Is IB Biology practice on COSMIQ free?
Yes. IB practice on COSMIQ is free — voice tutoring, a smart board, and realistic practice questions, with no card required.