Artificial Evolution - Evolution that is guided by an intelligence instead of occurring naturally. Biological Virus - The type of virus that infects living cells. They trick the cell into making more of the virus. These viruses may also cause symptoms in the host organism that aid the virus in spreading. Cell - The smallest unit of life.
All forms of life are either a single cell, or are made up of many cells.
In thermodynamics, a system that does not gain or loose energy is said to be closed. See also, Thermodynamics , System , Open System . Computer Virus - The type of virus that infects computer programs. They attach themselves to computer programs to trick the user into running them, thus creating more of the virus. When certain conditions are met, the virus will perform its function, called the payload, which is usually something harmful to the computer such as the deletion of files.