The Three Domain System is a classification system for living beings that includes Bacteria, Archaea and Eukarya and is based on the comparison of ribosomal RNA. It does not include prokaryotes.
What is the three domain system?
It is a method for classifying cellular life that was initially proposed by Carl Woese in 1990.
Characteristics of the three domain system
- It was the creator of the new molecular taxonomy based on the interspecies comparison of the so-called 16s and 18s ribosomal RNA sequence.
- Under the three-domain system, all cellular life can be divided into three domains: Archaea, Bacteria, and Eukarya, and each domain can be divided into kingdoms, phyla, classes, and so on.
- One of the domains in the three-domain system is Archaea, which contains members without a nuclear membrane, such as thermoacidophiles, which can be found in high-temperature.
Therefore, we can conclude that Woese's three domain system classifies life into three domains: Bacteria, Eukarya and Archaea.
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