researchers seldom find prokaryotic cells that are greater than 100 micrometers in diameter. Why would the size of prokaryotic cells be restricted?

because cell volume increases much quickly in relation to the surface area.

Explanation:

The size of prokaryotic cells is limited because the volume of organisms/cells increases much quickly in comparison to the surface area. The larger the cell, the more difficult it is for required materials to be distributed within it and the smaller the cell, the easier it is for materials to be distributed round the cell.