The cell membrane is a structure that separates the cell from its environment. Identify an object or molecule that cannot pass through the cell membrane.
Explain why preventing the free passage of this object or molecule helps the cell.

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

answer; strength of association;

answer; pluralist democracy;