The United Illuminating Company (UI) is a regional electric distribution company based in Orange, Connecticut.
Although generally not visible to the naked eye, organisms composed of prokaryotic cells still dominate the earth. Their collective mass is at least 10 times greater than the mass of all eukaryotes combined. Organisms composed of prokaryotic cells are classified into 2 main groups: archaea and bacteria. Archaea most closely resemble the first primitive cells on our planet.
Comstock/Comstock/Getty Images. The four eukaryotic kingdoms include animalia, plantae, fungi and protista. All organisms in these kingdoms have cells that have a nucleus, unlike prokaryotic cells.Almost all organisms in the eukaryotic kingdoms are multicellular organisms.1  What Are the Two Prokaryotic Kingdoms?he four eukaryotic kingdoms include animalia, plantae, fungi and protista. All organisms in these kingdoms have cells that have a nucleus, unlike prokaryotic cells. Almost all organisms in the eukaryotic kingdoms are multicellular organisms. 1  What Are the Two Prokaryotic Kingdoms?