An account of the structure of plants naturally begins with the cell which is the proximate unit of organic structure. The elementary unit of plant structure, as of animal structure, is the cell. Faunistically, although not geographically, the Nearctic and Palaearctic areas must form the two subdivisions of one great unit, for which the  Holarctic region  is now the generally accepted term.
Definition: a subclass considered a phylum of the kingdom Protista in some classifications; includes holozoic or saprozoic flagellates.
Salmonella /ËsaelmÉËnÉlÉ/ ËsÃ¦lmÉËnÉlÉ is a genus of-rod (shaped) bacillus bacteria of The enterobacteriaceae. Family there are two species Of, Salmonella salmonella bongori And salmonella. Enterica salmonella enterica is further divided into six subspecies and over 2500. serovarsalmonella can be found in the digestive tracts of humans and animals, especially reptiles. Salmonella on the skin of reptiles or amphibians can be passed to people who handle the animals. Food and water can also be contaminated with the bacteria if it comes in contact with the feces of infected people or animals.