Archaea (/ɑːrˈkiːə/ ar-KEE-ə; sg.: archaeon /ɑːrˈkiːən/ ar-KEE-ən) is a domain of single-celled organisms. These microorganisms lack cell nuclei and are...

of either three domains, Archaea, Bacteria, and Eukarya, or two domains, Archaea and Bacteria, with Eukarya included in Archaea. In the three-domain model...

Archaea is a domain of single-celled organisms. Archaea or archea may also refer to: Archaea (spider), an extinct genus of Archaeidae Archaea (journal)...

classification system that groups all cellular life into three domains, namely Archaea, Bacteria and Eukarya, introduced by Carl Woese, Otto Kandler and Mark...

or Asgardarchaeota is a proposed superphylum consisting of a group of archaea that contain eukaryotic signature proteins. It appears that the eukaryotes...

the Asgard archaea, and are closely related to the Heimdallarchaeia. This implies that there are only two domains of life, Bacteria and Archaea, with eukaryotes...

are classified into two domains, Bacteria and Archaea. It emerged from development of knowledge of archaea diversity and challenges to the widely accepted...

Eukaryota. Archaea are further divided into multiple recognized phyla. Archaea and bacteria are generally similar in size and shape, although a few archaea have...

domains of life they can be extremely diverse. Two of the three domains, Archaea and Bacteria, only contain microorganisms. The third domain Eukaryota includes...

prokaryotes are divided into two domains: Bacteria (formerly Eubacteria) and Archaea (formerly Archaebacteria). Organisms with nuclei are placed in a third...

The Surprising Archaea: Discovering Another Domain of Life is a popular science book written about the domain Archaea. It was written by John L. Howland...

Archaea is an extinct genus of spiders in the family Archaeidae. As of October 2016[update], four species are placed (or possibly placed) in the genus...

Most prokaryotes are unicellular and are classified into bacteria and archaea. Many eukaryotes are multicellular, but some are unicellular such as protozoa...

Canada used a system of six kingdoms (Animalia, Plantae, Fungi, Protista, Archaea/Archaebacteria, and Bacteria or Eubacteria), while textbooks in other parts...

aerobic process performed by small groups of autotrophic bacteria and archaea. The process of nitrification begins with the first stage of ammonia oxidation...

ancient common ancestor. These evolutionary domains are called Bacteria and Archaea. The word bacteria is the plural of the Neo-Latin bacterium, which is the...

One main characteristic of the three-domain method is the separation of Archaea and Bacteria, previously grouped into the single kingdom Bacteria (a kingdom...

life forms. No form of extraterrestrial life has yet been discovered. Archaea – a domain of single-celled microorganisms, morphologically similar to...

Cell wall Capsule Pili Marine prokaryotes are marine bacteria and marine archaea. They are defined by their habitat as prokaryotes that live in marine environments...

ancestral cell from which the three domains of life, the Bacteria, the Archaea, and the Eukarya originated. It is suggested to have been a "cellular organism...

Archaea, one of the three domains of life, are a highly diverse group of prokaryotes that include a number of extremophiles. One of these extremophiles...

DPANN is a superphylum of Archaea first proposed in 2013. Many members show novel signs of horizontal gene transfer from other domains of life. They are...

Methanogens are anaerobic archaea that produce methane as a byproduct of their energy metabolism, i.e., catabolism. Methane production, or methanogenesis...

as Dunaliella salina, usually in conjunction with specific bacteria and archaea, which may vary from lake to lake. The most common archaeon is Halobacterium...

more empirical in recent years. The Taxonomic Outline of Bacteria and Archaea is a derived publication indexing taxon names from version two of the manual...

plants (also including algae and fungi) and prokaryotes (bacteria and archaea), is Latin and binomial in form; this contrasts with common or vernacular...

Orania archaea is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails. Subspecies Orania archaea archaea...

chemosynthesis (via oxidizing inorganic compounds such as hydrogen sulfide) by archaea and bacteria. Animals evolved in the sea. Lineages of arthropods colonised...

functional unit of life. Smaller organisms, including prokaryotes (bacteria and archaea), consist of small single cells. Larger organisms, mainly eukaryotes, can...

This article discusses the Unique properties of hyperthermophilic archaea. Hyperthermophiles are organisms that can live at temperatures ranging between...