<span>A effect mutation can have on viruses is If a virus mutates then it may change its shape making ti able to bind to the cell and enter into the cell.</span>
The answer to this question would be labile.
A permanent cell is the one that will not divide after fully developed. This includes the heart and brain cells. That is why when these organs damaged there will be a permanent loss of function.
Stable cell only divides in some occasion. The example would be liver cells or kidney cells.
The main site of red blood cell production is the liver.