Which is a primary difference between all prokaryotes and eukaryotic cells?

Prokaryotes are the most primitive organism that exists on earth. They have the simplest form of body organization and they do not perform complex tasks.

The eukaryotic cell has nucleus in it and they have more complex machinery in their body to perform various tasks accordingly.

The nucleus of the prokaryotes are not enclosed in the nuclear membrane and it is dissolve in the cytoplasm. It lacks true nucleus.

Eukaryotes have nucleus enclosed inside nuclear membrane.