Prokaryotic and Eukaryotic Differences

Age Differences
Scientists believe that prokaryotic cells (in the form of bacteria) were the first life forms on earth. They are considered “primitive” and originated about 3.5 billion years ago. That's 2 billion years earlier than eukaryotic cells and billions of years before our earliest ancestors, the hominids

Structural Differences
Eukaryotic cells contain two important things that prokaryotic cells do not: a nucleus and organelles (little organs) with membranes around them.

Size
Eukaryotic cells are, on average, ten times larger than prokaryotic cells.