Board Thread:General Discussion/@comment-45.22.8.219-20170101044232/@comment-109.240.96.34-20170207110839

Micro-organisms can be separated in two different categories: Eukaryotes (the ones with nucleus) and prokaryotes (the ones without nucleus). Also, these kind of organisms usually have only one cell.

These two groups can also be separated in three domains: Archaebacteria (mostly prokaryotes), bacteria (also mostly procaryotes) and protista (mostly algae).

Long story short: Migro-organism faunus would be really weird looking and according all laws of biology, impossible.