Question

What is the criterion for classificaton of organisms belonging to kingdom monera?????

Answer 1

The main criteria in this are the type of cell and way of gaining food.That is,
  Prokaryotic and Eukaryotic cell
  Heterotrophic and Autotrophic

Answer 2

The criterion is :
1) Cell structure (Whether the organism is prokaryotic or eukaryotic)

2) Body organization (whether it is unicellular or Multicellular)

Organisms belonging to Monera are unicellular prokaryote

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