What's the difference between prokaryotic cells and eukaryotic cells

Eukaryotic cells are what make up you (and also plants), whereas prokaryotic cells make up bacteria. If you think about the fact that bacteria are way smaller than plants and animals, you can remember that these cells are much smaller than eukaryotic cells. Prokaryotic literally means 'before the nucleus' so prokaryotes don't contain a nucleus, but they still have DNA, which is found in small rings floating around called 'plasmids'. Every prokaryotic cell has a cell wall surrounding it, whereas in the eukaryotic world only plant and fungal cells have cell walls, animal cells are only covered in a thinner layer known as the cell membrane. Finally, eukaryotic cells mostly divide by mitosis, but prokaryotes divide with binary fission.