Three Domain System

Contents

Key Stage 4

Meaning

The three domain system is a Biological Classification system that divides all living creatures into three groups; Archae, Bacteria and Eukaryota.

About the Three Domain System

Developments in genetics led to these three Domains to be added above the already established Kingdoms:

• Archaea - Primitive forms of bacteria.
• Bacteria
• Eukaryota - All eukaryotic organisms.

References

AQA

Three domain system, page 252, GCSE Biology; Third Edition, Oxford University Press, AQA

Three domain system, pages 230-1, GCSE Biology, Hodder, AQA

References

AQA

Three-domain system (of classification), pages 248, 249, GCSE Combined Science Trilogy; Biology, CGP, AQA

Three-domain system (of classification), pages 308, 309, GCSE Biology, CGP, AQA

Three-domain system of classification, page 80, GCSE Combined Science; The Revision Guide, CGP, AQA

Three-domain system; of classification, page 104, GCSE Biology; The Revision Guide, CGP, AQA