



Bape THE CELL 23 
to f form a single large vacuole, the volume of which is usually 
og vater than that of the protoplasm. Ina large cell the protoplasm 
urs as a layer lining the cell wall, while in addition there 
Fic. 13. Cells from an onion root — 
Th epee in the upper left-hand corner is a young one without vacuoles, while 
e others show various stages in the formation and enlargement of the 
vacuole. (x 800) 
a y be strands stretching across the vacuole. Fig. 13 shows a 
7 cell without vacuoles, and stages in the formation and 
