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.
cell membrane. the outer boundary of the cytoplasm, a layer that controls what enters and leaves a cell.thin, flexible barrier around a cell, regulates what enters and leaves the cell. cell wall. a protective outer covering that lies just outside the cell membrane of plant cells.