Dear student.
Both unicellular and multicellular organism performs cell division.
In unicellular organisms, cell division is a mode of reproduction. It is the process by which a single cell divides into two daughter cells.
In multicellular organisms, cell division is responsible for cell growth, differentiation, maintain shape, repairing of body parts and replacing of dead cells.
Both unicellular and multicellular organism has nucleus and genetic material.
Regards.