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 is composed of eukaryotic organisms: unicellular and multicellular algae, slime molds, and unicellular or simple colonial protozoans. Protists obtain their nutrition via several methods, including photosynthesis, devouring other organisms, and absorption. Protists can reproduce sexually or asexually, and they can be sedentary or move with pseudopods, flagella, or cilia. There are over 55,000 known living species and over 35,000 known extinct species in this kingdom.
Fungi
This kingdom is composed of single-celled (sometimes multicellular), eukaryotic organisms. Protists are more complex than bacteria and include protozooans and some types of algae.Kingdom Fungi includes organisms such as slime molds, mushrooms, smuts, rusts, mildews, molds, stinkhorns, puffballs, 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.
The Essay on 5 Kingdoms Of Life
... (Protoctista) The kingdom Protista includes a diverse array of organisms, from minute flagellated cells to macroscopic kelp. The smallest microscopic organisms are termed protists, consequently some ... humans. It is estimated that 99 percent of all the species that have ever lived on earth were already extinct before ...
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.
