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archaea : microorganisms of a domain including especially methane-producing forms, some red halophilic forms, and others of harsh hot acidic environments (as a hot spring) (archaea, 2015) [1]blank.gifWebster | OneLook | Visuwords
Archaea are a group of single-celled microorganisms. A single individual or species from this domain is called an archaeon (sometimes spelled "archeon"). They have no cell nucleus or any other membrane-bound organelles within their cells. In the past they had been classed with bacteria as prokaryotes (or Kingdom Monera) and named archaebacteria, but this classification is regarded as outdated. In fact, the Archaea have an independent evolutionary history and show many differences in their biochemistry from other forms of life, and so they are now classified as a separate domain in the three-domain system. In this system, the phylogenetically distinct branches of evolutionary descent are the Archaea, Bacteria and Eukaryota. (Archaea, 2015) [2]blank.gif Wikipedia


Evolution Deep Sea Vents and Life's Origins

Under the Sea, a Missing Link in the Evolution of Complex Cells (Carl Zimmer, New York Times)
Newly found microbe is close relative of complex life (Paul Rincon, BBC News)
Deep-sea microbes called missing link for complex cellular life (Will Dunham, Reuters)

Evolution: Steps on the road to eukaryotes ( T. Martin Embley & Tom A. Williams)

Journey to the Centre of Earth P3
(Vast Subsurface Bacteria, Formation of Caves)

Secrets of the deep: How the mass of organisms living in undersea volcanoes and rocks could out-weigh all of the animals on the surface (Eddie Wrenn, Daily Mail Online)
Researchers find evidence of 'incredible bio-mass' around deep-sea vents.

The Discovery of Archaea, the 'Third Branch of Life', and Its Impacts

First detailed report defines limits of methane-exhaling microbial life in an undersea volcano (Phys.org)

Researchers Identify Mysterious Life Forms in the Extreme Deep Sea (Scripps News)

Microbe found that can use arsenic as nutrient (Randolph E. Schmid, AP Science Writer)


blank.gifmicroorganismblank.gif virus blank.gif archaea blank.gif prokaryote (bacteria) blank.gif mitochondria, chlorophlast
blank.gifeukaryote blank.gifplant algae blank.gifnot plant or animal protist, fungi, lichen blank.gifanimal protozoa, amoeba

blank.gifmicroscope blank.gif Linnaean system blank.gifmorphologyblank.gifanatomyblank.gifphysiology blank.gif cellblank.gifgeneblank.gifevolutionblank.giffossil



Bacteria | Biology | Bacteriology

Intimate Strangers: Unseen Life on Earth 4 Part Video Series

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    Editor Mary E. Hopper
    Contributor Neil R. Carlson

    © Cosma creator mehopper editor mehopper revised 7/14/2016 v.1.5
    1. ^ archaea. (2015). In Merriam-Webster Online Dictionary (11th ed.). Retrieved June 21, 2015, from http://www.merriam-webster.com/dictionary/archaea
    2. ^ Archaea. (2015). In Wikipedia, The Free Encyclopedia. Retrieved June 21, 2015, from http://en.wikipedia.org/wiki/Archaea