Some bacteria have flagella. However, when present, bacterial flagella have no microtubules. Some have filamentous structures, pili , projecting from the surface. Metabolic diversity is much greater than for other life forms. In contrast, a eukaryote cell is uni- or multicellular and generally larger than a prokaryote cell.
Membranous organelles including a nuclear envelope are present.
The eukaryote ribosome is large and comprised of two subunits. Cell walls, present in some forms, are composed of cellulose . When present, flagella contain microtubules. Structural diversity is substantial, but metabolic diversity is fairly limited. They are similar to one another with respect to metabolic pathways.