Characteristic features of kingdom Monera are :
1. Monera are usually single-celled
2.They have a rigid cell wall
3.DNA present is naked and circular in nature.
4.DNA does not contain a nuclear envelope.
5.Autotrophic mode of nutrition is [resent.
6.Respiration can either be aerobic or anaerobic
7. Also, some monera live in acidic conditions.