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.
cells take in food, oxygen, and other substances from the environment and release waste into the the environment. selectively (semi) permeable. regulates what enters and exits the cell, it is based on the size of the particles and the size of the openings in the membrane. passive transport. the result if a substance moves through the membrane without the input of energy.