Prokaryote+cell

Prokaryotic cells lack a membrane-bound nucleus. Very few parts of this cell can be viewed under a microscope. Cells such as bacteria lie in the prokaryote family. Their genetic information can be found in a circular loop called a plasmid. The cells are very small, about 1-2µm in diameter and 10 µm long. The main shapes that prokaryotic cells can be found in are rod-shaped, spherical, and spiral. The cells divide by binary fission. Prokaryotic cells such as bacteria play a very important role in our planet. They act as decomposers and get rid of waste. Their digestive system makes our world a better place to live. cell video http://www.youtube.com/watch?v=zufaN_aetZI

Sources: http://library.thinkquest.org/C004535/prokaryotic_cells.html, http://www.daviddarling.info/encyclopedia/P/prokaryoticcell.html, http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookmito.html.