explain unicellular organisms
Unicellular organisms are organisms that have one cell. They are divided into two quite different types, from different classification kingdoms. 1  The prokaryotes, bacteria and archaea, have cells with no nucleus and a simple cell structure.2  Eukaryotes have a nucleus, and a more complex cell structure.nicellular organisms are organisms that have one cell. They are divided into two quite different types, from different classification kingdoms. 1  The prokaryotes, bacteria and archaea, have cells with no nucleus and a simple cell structure. 2  Eukaryotes have a nucleus, and a more complex cell structure.