But the relationship between the little red people and the Archaea was clearly not a simple one.

Within the Archaea, there are six mutual and five single changes.

It is also produced by some other bacteria and archaea.

Archaea were recognized as a domain of life in 1990.

This is a relatively wide range when compared to other archaea.

There are four types of cell wall currently known among the Archaea.

That's what happened when a class of organisms was discovered about 15 years ago - archaea.

However, there are no known Archaea that carry out photosynthesis.

The genetics of bacteria, archaea and viruses is a major field or research.

Although not truly unique, the cell walls of Archaea are unusual.

They are classified as archaea, a domain quite distinct from bacteria.

Archaea and mitochondria use a similar code with minor differences.

Preliminary analysis shows that two of its archaea may be among the most primitive organisms on earth.

It isn't fair, the Archaea said to each other.

The Archaea include simple organisms, that were first discovered in extreme environments.

Recent research has found ammonia-eating archaea in soil and seawater.

Archaea show high levels of horizontal gene transfer between lineages.

Archaea differ from bacteria in both their genetics and biochemistry.

The classification of archaea into species is also controversial.

Archaea carry out many steps in the nitrogen cycle.

Iron is an essential nutrient for all living organisms, from archaea to humans.

It is not found in plants, archaea, or fungi.

Meanwhile the Archaea were experiencing a population explosion, and spoiling for a fight.

Living things are classified into three domains: bacteria, archaea and eukaryotes.

The Archaea have an independent evolutionary history and show many differences in their biochemistry from other forms of life.