IB Biology A4.1.4 Evidence from homologous structures
IB Biology A4.1.4 Evidence from homologous structures
Practise using homologous structures, especially pentadactyl limbs and wings, as evidence for common ancestry and divergent evolution.
How this is tested
- describe how similar bone patterns can support common ancestry despite different functions
- distinguish homologous from analogous structures in MCQ and diagram-based contexts
- apply limb and wing examples to infer which organisms are more closely related