Answer:
D. Nucleus
Explanation:
Prokaryotes are unicellular organisms that lack membrane-bound structures, the most noteworthy of which is the nucleus.
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes. ... a membrane-bound nucleus.
All viruses contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid.
