Question

Which is the best definition of a prokaryotic cell?

Answer 1

here is a picture to help further improve your knowledge one prokaryotic cells
http://biology.kenyon.edu/HHMI/Biol113/procell2.gif

Answer 2

a prokaryotic cell does not have a nucleus, mitochondria, they also don't have membrane-bound organelles.

Answer 3

and a prokaryotic cell is single celled
and a prokaryotic cell is pretty much the opposite of eukaryotic cells