Its not. many animals can eat and move their ears without it.
what is the purpose of a democratic constitution
the cellmembrane?
Cell
Nucleus cytoplasm cellmembrane and chloroplasts
it selectively lets thingd transport into and out of the cell
yes. They do not however, have a membrane separating the nucleus from the rest of the cell
Nucleus cytoplasm cellmembrane and chloroplasts
a cellwall is a hard fibrous structure where as the cell membran is like cling film, its really thin and flimsy
just have some sort of line you could even draw it in with marker.. just have something showing it
It protects the cell from outside forces. The cell membrane works as a selective filter that allows only certain things to come inside or go outside the cell.
One possible reason behind the inability of a certain substances to pass across a cell membrane is molecule size.
If it was an strong alkali it would be irritant for the skin, if it was a weak alkali it would clean anything. Soap kill bacterias, the soap goes in to the bacterias cellmembrane and their membrane will be overlasted of water so it will explode and without cellmembrane the bacteria is as good as dead, then you wash your hands with water and the bacterias will go.