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What are the functions of cell wall in plant cell?
 
a. In addition to the cell membranes, the plant cells contain a thick outer layer known as the ________.
 
b. The cell wall surrounding the ________ protects the plants from variations in temperature, high wind speed, atmospheric moisture.
 
c. Animal cells have a cell wall and a cell membrane, but plant cells have a cell membrane but no cell wall.
 
d. The cell wall serves as a _________ for the plant and bacterial cells.
 
e. In plant cells, the cell wall is made up of a non-living substance known as ___________.
 
f. Cellulose helps maintain the _________ of the plant cell and makes the cell rigid and upright even when it grows in height.