Which of the following describes the fundamental difference between prokaryotic and eukaryotic cells? 
 A. Eukaryotic cells are the only type of cells that can possess a cell wall.
 B.Prokaryotic cells do not have a true nucleus or membrane-bound organelles.
 C.Prokaryotic cells are all viruses and rely on the infection of a host cell to replicate.
 D.Eukaryotic cells are only found in protists, bacteria, and viruses.