Therefore, as gravity affects all things equally, regardless of their mass in grams or kilograms, and because 1 m/s 2 = 100 cm/s 2, the surface gravity of Earth could be expressed in cgs units as 980.665 cm/s 2 and at base 10 logarithm (log g) as 2.992.
The cell wall is only in plants, and it gives the plants structure. The cell membrane controls the movement of substances entering and leaving the cell.
The cell membrane controls what enters and leaves the cell, allowing the cell to absorb the oxygen and nutrients it needs to function and also protects the cell from most dangerous chemicals. It is vital because the cell needs to be able to control its oxygen and carbon dioxide levels.