Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that ...

Prokaryotes are unicellular and lack a nucleus and membrane-bound organelles. They are generally smaller and simpler and include bacteria and archaea. Eukaryotes on the other hand are often ...

How do bacteria avoid wasteful production of unnecessary ... Interestingly, the relatively simple mechanisms of gene expression in prokaryotic cells, as exemplified by the trp and lac operons ...