Every living organism falls into one of two groups: eukaryotes or prokaryotes, with cellular structure determining which group an organism belongs to. Prokaryotes are unicellular and lack a nucleus ...

Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique ...

The high prokaryotic mortality in pelagic habitats is caused by both viral lysis and predation by ciliated and flagellated protists. Viral lysis is thought to have the greatest effect on prokaryotic ...