This document outlines the key differences between prokaryotic and eukaryotic cells. It notes that there are two main types of cells - prokaryotes, which are the simplest life forms and earliest inhabitants of Earth, and eukaryotes, which developed from prokaryotes and include more complex multicellular organisms like animals, plants and fungi. Prokaryotes exist in two kingdoms - bacteria and archaebacteria, which can survive in extreme environments, while eukaryotes are larger and have membrane-bound nuclei and organelles.