The Five Kingdoms

The Five Kingdoms Monera This biological kingdom is composed of bacteria and cyanobacteria, one-celled (sometimes colonial) organisms whose cells lack a nuclear envelope, mitochondria, or plastids. They reproduce asexually through fission (splitting in two) and mainly gain their nutrition by absorbing it from their environment (though some species are chemoautotrophs or photosynthetic). This is the most primitive of the five kingdoms; it encompasses all the bacteria. Monerans are single-celled prokaryotic organisms. Protista This biologic kingdom …

…truffles and yeasts. All are classified in this kingdom because they absorb food in solution directly through their cell walls and reproduce through spores. None conduct photosynthesis. Plantae The members of this kingdom are multicellular, eukaryotic organisms that (usually) conduct photosynthesis. Animalia The members of this kingom are complex, multicellular, eukaryotic organisms that digest food outside their cells and then absorb the digested nutrients. Animals must consume other organisms to obtain most of their nutrients.