a vegetable room is a mean of room & a room is a mean of preposition & a room is very big ->  a plant cell is a very small object  a plant cell is a very small object & a whole of an preposition is smaller in weight than the part preposition ->  a part of the plant cell will be smaller than a plant cell  a part of the plant cell will be smaller than a plant cell & a streams is used to smell big nothing by car by wash them appear bigger -> a microscope can be used to see parts of the plant cell