How many different kingdoms of organisms are there?

There are 6 kingdoms

Eukaryotes: --Plantae: Plant kingdom (multicelled), self explanatory

--Animalia: Animal kingdom (multicelled), self explanatory

--Fungi kingdom (both mutli and single celled), contains mushrooms and mold

--Protista: leftover Eukaryotes that aren't animals and don't really fit in anywhere else

Prokaryotes: -- Archebacteria: Very strange single-celled prokaryotes that have the basic cell structure of , but tend to live in really extreme environments like sulfur vents.

-- Eubacteria: What we typically think of as bacteria. Single-celled, prokaryotic organisms, some of which act as pathogens.