Prokaryotes are divided into two distinct groups: the bacteria and the archaea ... organisms that have a relatively simple structure. Prokaryotic cells are surrounded by a plasma membrane ...

Planctomycetes challenge our concept of the bacterial cell and of a prokaryote as ... Phylogenetic structure of the prokaryotic domain: the primary kingdoms. Proc Natl Acad Sci U S A 74, 5088 ...

Bacteria are amongst the simplest of organisms - they are made of single cells. Their cell structure is simpler ... in a few simple eukaryotic organisms. Prokaryotic cell DNA is a single molecule ...

Scientists propose that the eukaryotic branch of this family tree formed when two prokaryotes ... through homologs of already described ones in bacteria, we won't find them.” Buzz Baum, a cell ...