The cell theory states; that calls are the building blocks of all living things: they can be multicellular or uni-cellular, all life processes take places in cells and new cells come from pre-existing cells. Also all cells have the basic chemical composition, but not all cells are like.
There are two types of cells Eukaryotic and Prokaryotic cells. Eukaryotic cells include animal, plant and fungal cells. Prokaryotic cells include bacteria. E coli and Achaea Also prokaryotes are much more simple than the eukaryote. Prokaryotes are unicellular and 10-100 microns in size. The prokaryote cells feed from sunlight, they photosynthesize, also they cause disease because they feed on living things and last also they feed on dead things. Eukaryote cells are more complicated, they have organelles, also have chromosomes, they can be multicellular or unicellular. They distinguish between plant and animal cells. A eukaryote cell has a nuclease unlike prokaryotes, they do not have a nuclease but they have DNA floating around