One group causes rabies , measles, mumps, and influenza. Generally, viruses transmit their nucleic acid into a host cell. Two familiar propagation schemes are those of HIV-1 and bacteriophages. The Kingdom Monera is comprised of bacteria . In addition, most have a cell wall consisting mostly of peptidoglycan.
Reproduction is by binary fission .
Some bacteria have flagella, but no microtubules. Some have filamentous structures, pili , projecting from the surface. Metabolic diversity is much greater than for other life forms. Most bacterial classification schemes are artificial and are constantly in a state of flux. The one most widely used is based on structural and physiological characteristics useful in identifying pathogens.