Cell
This is an old revision of this page, as edited by Girona (talk | contribs) at 18:04, December 30, 2007. It may differ significantly from current revision.
The cell is the smallest unit of life capable of independently reproducing itself. It is a small, watery, compartment filled with chemical-based machinery and a complete copy of the organism's genome. There are two main types of cells: procariotic cells, which lack a real nuclei, and eucariotic cells, with a nuclei sepparated from cytoplasm by a nuclear membrane.
A bacterium is a simple cell without a nucleus to protect its genetic information. A virus requires structures in a cell's cytoplasm to assemble copies of itself. There is no consensus on the exact number of cells in a human body, though the number ranges from 10 to 100 trillion cells.[1]
References
- ↑ Wile, Jay L. Exploring Creation With General Science. Anderson: Apologia Educational Ministries, Inc. 2000