The atom? gas? either one of those two would work
Answer:
Prokaryotic, and eukaryotic cells share basically four common features:
1) A plasma membrane which is known as outer covering membrane it helps to separate the interior part of the cell from its surrounding.
2) Cytoplasm which is consisted of gel like region inside the cell where other parts of the cell are found.
3) Genetic material of the cell which is known as DNA.
4) Ribosomes, which helps in protein synthesis.
None of them.
I'm assuming that you left off an option. a prokaryotic cell is a single-celled organism, generally a bacteria. an example would be e-coli.