View source for Archea

&nbsp;Archea are unicellular microorganisms<sup>[1]</sup>. They do not have nucleus or any other&nbsp;organelles. They were classified as a strange group of bacteria and were called&nbsp;archaebacteria. However, later, it was found that archea have their own&nbsp;evolutionary history&nbsp;and manifest numerous differences in their biochemistry from other forms of life, therefore they are&nbsp;classified as a separate domain in the three-domain system<sup>[1]</sup>.













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1.[http://eol.org/info/457 eol.org/info/457]