IB Biology Concepts

Most tested syllabus areas

1. A Unity and DiversityPublished Concept evidence in Unity and Diversity repeatedly links cell structures, nucleic acids, organism diversity and evolution. The strongest pattern is not isolated recall, but explaining how molecular and cellular evidence supports biological unity, variation and classification.90%
2. C Interaction and InterdependencePublished Concept evidence in Interaction and Interdependence clusters around regulated processes, signalling, defence and ecological relationships. The recurring pattern is explaining how interactions control biological outcomes, from enzyme activity and energy transfer to population change and ecosystem cycling.67%
3. D Continuity and ChangePublished Concept evidence in Continuity and Change repeatedly connects genetic mechanisms, cell division, inheritance, regulation and selection. The strongest pattern is explaining how information is maintained, altered and acted on across cells, organisms and populations.66%
4. B Form and FunctionPublished Concept evidence in Form and Function repeatedly asks students to connect structure with function across molecules, membranes, cells and exchange systems. The strongest pattern is explaining how specific features enable transport, support, movement, regulation or adaptation.65%