up vote 3 down vote accepted. $\pi$ is the name of the constant relating the diameter and circumferance of a circle. It's a definition, a particular constant that we thought deserved a name. $e$ happens to be the name of a constant from a particular limit. Like $\pi$, we named it because we thought it would be useful. In Physics, many, many constants have names. Gravitational constants, expansional constants, electrical constants, etc. Each is useful, but somewhat arbitrarily chosen.
Bacteria: The Monera Kingdom Bacteria are classified into two groups: Eubacteria (true bacteria) and Archaebacteria (Ancient Bacteria). They are autotrophic. 28-1 Chapter 28: Microbiology. 28-2 Viruses Viruses are noncellular, nonliving particles and therefore are not included in the classification scheme.
Previously they had been categorized as one kingdom Monera, but has since been split.   Bacteria belong to the kingdom (Monera) this kingd â¦ om includes all bacteria protazoa and the ameba   Once considered a part of the plant kingdom, bacteria were eventually placed in a separate kingdom, Monera.ubacteria are average, new, bacteria. The controversial part is that some people believe that we should just have 5 kingdoms, and that Archaebacteria, and Eubacteria should just be one kingdom, called Monera! Plantae.