How do they engrave the wall?

No

It protects the cell and gives it is't shape

A wall is a tough protective boundary around a structure but it can have some door like opening to pass through. As wall is around a cell that's why it is called cell wall. In this way a tough...

chris brown

Because some people do not have a good enough explanation for some the things that they do or say.So that is why you lie so much............You got to tell more lies to cover up the lie you just told...