Cells Cell Theory 1. 2. Large Small 3. Levels of Organization Prokaryotes Eukaryotes Viruses Organelles Nucleus Genetic Material Cells Examples What do prokaryotes, eukaryotes, and viruses have in common? Which is the most complex? Why? Endosymbiotic Theory The theory that states that eukaryotic cells evolved (changed over time) through a process that involved different types of prokaryotes being engulfed (eaten) and living together inside larger prokaryotic cells and eventually developing into the cells’ mitochondria, chloroplast and other membrane bound organelles. Sketch the Endosymbiotic Theory Below: Time