Biology GCSE
Three-domain system
What Three-domain system means in Biology GCSE, as defined for AQA.
Definition of Three-domain system
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Reference: AQA
The system of Bacteria, Archaea and Eukaryota, which resulted from molecular evidence showing that archaea are distinct from bacteria.
Topics that use Three-domain system
- Classification of living organisms (AQA GCSE)
Related terms
- Binomial naming
- Binomial system
- Biochemical evidence and DNA sequencing
- Changing classification
- Classification
- Combining multiple evidence sources
- Current classification data
- Evidence-based classification
Using Three-domain system in the exam
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