Archaea: Properties

The Archaea (/ɑrˈkiːə/ ( listen) ar-kee) 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 nor any other membrane-bound organelles within their cells.
source: http://en.wikipedia.org/wiki/Archaea

CLICK ON IMAGE TO ENLARGE. Source: http://biology.kenyon.edu/courses/biol112/Biol112WebPage/Syllabus/Topics/Week%205/Week%205.htm
source: http://www.windows2universe.org/earth/Life/archaea.html
THESE ABOVE LIVE IN EXTREME HEAT.

LEARN MORE WITH THESE GREAT NOTES:

Kimball's Biology Pages: Archaea

MORE INFO HERE AS WELL:

Introduction to the Archaea

MUST KNOW:

Difference Between Archaea and Bacteria

bacteria
There are two kinds of microorganisms that are divided into prokaryotes and those include bacteria and archaea. But not all bacteria and archaea belong to prokaryotes. Complicated subject, isn’t it? Here is more information on the differences between these two microorganisms.
Both bacteria and archaea have different Ribosomal RNAs (rRNA). Archea have three RNA polymerases like eukaryotes, but bacteria have only one. Archaea have cell walls that lack peptidoglycan and have membranes that enclose lipids with hydrocarbons rather than fatty acids (not a bilayer). These lipids in the membranes of archaea are unique and contain ether linkages between the glycerol backbones rather than ester linkages. Archaea resembles eukaryotes more than bacteria. Their ribosomes work more like eukaryotic ribosomes than bacterial ribosomes.
These two microorganisms also differ in genetic and biochemical ways. Only within the last couple of decades, archaea were recognized as a distinct domain of life. They are extremophiles, meaning they thrive in physically or geochemically extreme conditions. They have similar ecological roles as bacteria. Both of these organisms react to various antibiotics in a different way.
Summary:
Archaea: cell membrane contains ether linkages; cell wall lacks peptidoglycan; genes and enzymes behave more like Eukaryotes; have three RNA polymerases like eukaryotes; and extremophiles
Bacteria: cell membrane contains ester bonds; cell wall made of peptidoglycan; have only one RNA polymerase; react to antibiotics in a different way than archea do.

Read more: Difference Between Archaea and Bacteria | Difference Between | Archaea vs Bacteria http://www.differencebetween.net/science/difference-between-archaea-and-bacteria/#ixzz1M99DJ7jh

THREE MAIN GROUPS OF ARCHAEA YOU MUST KNOW:

  1. Methenogens
  2. Extreme Halophiles
  3. Extreme Thermophiles

PICS OF EACH:

METHANOGENS
FYI: BREAKING DOWN THE WORD: "GEN"ERATES "METHAN"E

source: http://www.daviddarling.info/encyclopedia/M/methanogen.html
EXTREME HALOPHILES
FYI: HALO MEANS SALT AND PHILES MEANS LOVE OF.
source: http://www.wingsofjustice.com/fendi-swimwear.html
EXTREME THERMOPHILES
FYI: THERMO YOU CAN REMEMBER THAT FOR HEAT.

source: http://bionerds.freeservers.com/photo3.html

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