What is the advantage of a cell being shaped like a sphere and one shaped like a cylinder?

There are basically three types of cell shapes: coccus (spherical), bacillus (rod or cylindrical shaped), and spiral (twisted). Cell size is limited by a cell's surface area to volume ratio. The Shape of a cell determines the function of the cell.

Cells having spherical shapes are best and most advantageous because they have the smallest size that increases the surface-to-volume ratio. The cells with spherical shape experience greater frictional resistance.

Cells having a cylinder or rod-shaped helped the cell to concentrate molecules at specific cellular locales. Cylindrical cells are able to concentrate proteins at different locations in the cell.

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