Plant and animal cells are both eukaryotic cells, meaning they contain a nucleus and membrane-bound organelles, Which of these structures is found in a plant cell but is NOT In an animal cell?

Life, yes life it self madden

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.