• It is an extremely small cell
• Has a simple internal structure
• Has no membrane bound organelles
• Only Bacteria and Cyanobacteria are prokaryotes

• Has complex internal structure
• Has many membrane bound organelles
• Has membrane bound nucleus
• Inc. animals, plants, protozoa and fungi

Plasma Membranes

• Each living thing has a plasma membrane
• Controls the entry of dissolved substances into and out of cell
• major component=Phospholipid
• Plasma membrane is made of a double layer of phospholipids with proteins embedded into the layer to provide channels

• is to hold the Cytoplasm within its boundaries
• Controls movement in and out of the cell, it allows come substances to cross by either diffusion or active transport
  
• Semi pearmeable