Eubacteria: These organisms are considered to be true bacteria and are classified under the Bacteria Domain. While most bacteria do not cause disease, others can cause serious illnesses. Bacteria reproduce at an alarming rate under the right conditions. Most reproduce by binary fission.

Streptococcus pneumoniae

Salmonella enterica

Archaebacteria: Single-celled prokaryotes were originally thought to be bacteria. They are in the Archaea Domain and have a unique ribosomal RNA type. The cell wall composition of these extreme organisms allows them to live in some very inhospitable places, such as hot springs and hydrothermal vents.

Methanobrevibacter smithii

Halobacterium salinarum

Protista: This Kingdom includes a very diverse group of organisms. Some have characteristics of animals (protozoa), while others resemble plants (algae) or fungi (slime molds). These eukaryotic organisms have a nucleus that is enclosed within a membrane.

Slime molds

Water molds

Fungi: Fungi include both unicellular (yeast and molds) and multicellular (mushrooms) organisms. Fungi are decomposers and acquire nutrients through absorption.

Mycorrhizae

Lichens

Plantae: Plants are extremely important to all life on earth as they provide oxygen, shelter, clothing, food, and medicine for other living organisms. This diverse group contains vascular and nonvascular plants, flowering and nonflowering plants, as well as seed bearing and non-seed bearing plants.

Vines

Mosses

Animalia: This Kingdom includes animal organisms. These multicellular eukaryotes depend on plants and other organisms for nutrition. Most animals live in aquatic enviornments and range in size from tiny tardigrades to the extremely large blue whale.

Opabinia

Cephalaspidida

Citation:

Bailey, Regina. “What Are the 6 Kingdoms of Life?” About.com Education. About Education, 08 Dec. 2016. Web. 09 Feb. 2017.