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.