Prokaryotes are primitive organisms as their name suggest where all cell oragnelles are not well developed while eukaryotes are developed organisms with well defined cell organelles
Plant cell and animal cells structure differs in many aspects. The main difference is the presence and absence of cell wall.
Organisms are composed of cells which have some special structures that help them to perform some special functions. These structures are known as cell organelles. Such organelles are nucleus, ER, golgi body, lysosome, chloroplast, mitochondria.
Cell theory states that all living organisms are made up of cells. It is the basic unit of life. According to Rudolf virchow that "omnis cellulae e cellulae".