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.
Most of the living bacteria that are known to be parasitic and cause diseases are also found in this kingdom. The three basic morphological types of bacteria are: bacillus (rod shaped), cocci (spherical), and curved/helical. Salmonella enteritidis is a bacillus shaped bacteria.almonella enteritidis belongs in the Bacteria domain as it is prokaryotic, lacks a true nucleus, lacks membrane bound organelles, and contains peptidoglycan in the cell walls. Eubacteria: Also known as âtrue bacteria,â the. is the most common kind of bacteria found today.