This means that certain cells are made by the body for different reasons. For instance, muscular cells are made for muscles, bone for bones, etc.
Hope this helped!
This is false. Since space exploration has begun, cooperaion and goodwill has been devolped between nations.
The bark of a tree is impervious to gases and water because bark cells are dead cells of the epidermis and compactly arranged without intercellular spaces. They contain a chemical called suberin in their walls that make them impervious to gases and water and it doesn't allow gases or water into the tree as bark cells are in the bark outer most layer of the tree.
