AQA GCSE Combined Science Trilogy · 8464
Paper 2
Revise: Classification SystemsChemical evidence led Carl Woese to develop the three-domain system, proposed in 1990. Domains are larger groups than kingdoms.
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GCSE Combined Science · key term
A broad classification group above kingdom. The three domains are Archaea, Bacteria and Eukaryota.
Used by AQA and Edexcel
Paper 2
Revise: Classification SystemsChemical evidence led Carl Woese to develop the three-domain system, proposed in 1990. Domains are larger groups than kingdoms.
Paper 1, Paper 2
The highest level of biological classification in the three-domain system, above kingdom.
Revise: Genetic Analysis and the Three-Domain Classification SystemA domain is a broader classification group than a kingdom. In the three-domain system, the four eukaryotic kingdoms are grouped within Eukaryota, while organisms formerly grouped together as prokaryotes are separated into Bacteria and Archaea.
A domain is above a kingdom. The three-domain system does not mean that plants, animals, fungi and protists have stopped being separate kingdoms.
Both Archaea and Bacteria lack a nucleus; this shared feature does not mean that they belong to the same domain.
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