cells are the fundamental unit of life all org are composed of cells all cells come from preexisting cells

bacteria and archaea are prokaryotes

• they have no membrane-enclosed internal compartments

prokaryotes

• dna is in the nucleoid
• no membrane-enclosed compartments (everything floating around)

eukaryotes

• dna is in the nucleus, surrounded by the membrane
• does have membrane-bound compartments (organelles)

cyto means cell

DNA -> protein to make lipids