IB Biology SL Continuity and Change Concepts

Continuity and Change links inheritance, regulation, reproduction, selection and environmental change to explain stability and transformation in cells, organisms and populations.

Exam analysis

Published 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.

Most tested topics

Inheritance53%
Cell and nuclear division48%
Homeostasis41%
Protein synthesis39%
Reproduction38%
Natural selection36%
DNA replication30%
Stability and change25%
Climate change25%
Water potential15%
Mutation and gene editing14%

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