BRAINCAKEClassification
Classification of organisms changes as more knowledge emerges.
Scientists can now study biological molecules such as DNA and proteins like haemoglobin to establish relationships between organisms.
Phylogenetic classification is based on evolutionary relationships between organisms and their ancestors.
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Key terms in this lesson
- homologous structures
- Structures in different species that share a similar underlying anatomy because of a common evolutionary origin, even though they may now perform different functions.
- analogous structures
- Structures in different species that perform the same function but do not share a common evolutionary origin.
More in Classification and Evolution
- Protoctista
- Fungi
- Plantae
- Animalia
- The Three Domain System
- Archaebacteria and Eubacteria
- Phylogeny
- Advantages of Phylogenetic Classification
All 36 lessons in Classification and Evolution · All OCR AS-level Biology topics