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