A prokaryote is a unicellular organism that lacks a membrane - bound nucleus (karyon), mitochondria, or any other membrane - bound organelle. The word prokaryote comes from the Greek πρό (pro) "before '' and κάρυον (karyon) "nut or kernel ''. Prokaryotes can be divided into two domains, archaea and bacteria. In contrast, species with nuclei and organelles are placed in the domain Eukaryota.
what is the meaning of prokaryotes in biology
a unicellular organism that lacks a membrane - bound nucleus (karyon), mitochondria, or any other membrane - bound organelle