In addition to the nucleus, eukaryotic cells may contain several other types of organelles, which may include mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes.

Bacteria are amongst the simplest of organisms – they are made of single cells. Their cell structure is simpler than the cells of animals, plants and fungi.

5 Prokaryotes and eukaryotes vary in several important ways – these differences include structural variation – whether a nucleus is present or absent and whether the cell has membrane-bound organelles ...

"Prokaryotes are much simpler with respect to structure," says Shanle ... In contrast, eukaryotic cells have membrane-bound ...