Definition of retain. transitive verb. 1a : to keep in possession or useb : to keep in one's pay or service; specifically : to employ by paying a retainerc : to keep in mind or memory : remember.
However, some gram- positive bacteria may also have capsules. Examples for gram-negative bacteria with capsules: Escherichia â¦coli, Klebsiella pneumoniae, Salmonella. Examples for gram-positive bacteria with capsules : Bacillus megaterium, Streptococcus pyogenes, Sterptococcus pneumoniae.
The structure of the capsule mouth in the Buxbaumiaceae is one of the most complex in the mosses and species in the family Diphysciaceae have similar capsule mouths. Interestingly, in the 2000 classification the family Diphysciaceae was placed in the order Diphysciales within the class Bryopsida.