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.
Prokaryotic cells however have no true nucleus. The word prokaryote means before the nut. DNA in a prokaryotic cell is not separated from the rest of the cell but coiled up in a region called the nucleoid. Eukaryotes include animals, plants, fungi and protists. Typically, eukaryotic cells are more complex and much larger than prokaryotic cells.