There are some alternative classifications of life : The two-empire system or superdomain system , with top-level groupings of Prokaryota -LRB- or Monera -RRB- and Eukaryota empires .

Among them are : The two-empire system , with top-level groupings of Prokaryota -LRB- or Monera -RRB- and Eukaryota empires .
