How can a cell be compared by a organism?

An organism can be a single cell or multi-cellular, living thing or business group or machine or even a social concept.

A cell is a self contained living thing, a subgroup within a larger group, one member of such a group, one bubble in a group of bubbles, or one part of a pattern that resembles bubbles.

You sort of need to explain your question so people know what you are talking about.