Large and complex

Small and Simple

0.1 to 5.0 μm in size

Mostly reproduce sexually

Unicellular only

Nucleus is absent

Cell division by mitosis

Has membrane-bound organelles

Circular DNA

Paired diploid (2n) chromosome

Single haploid (n) chromosome

Have DNA

Lack membrane-bound organelles

Reproduce both sexually and asexually

Nucleus is present

Have cytoplasm

Cell division by binary fission

Examples are bacteria and archaea cells

10 to 100 μm in size

Have cell (plasma) membrane

Examples are plant and animal cells, including humans

Have ribosomes