Rational Expressions Short Course. 1  Definitions covers the definition of a rational expression including what it means for a rational expression to be undefined and simplified.  Arithmetic reviews addition, subtraction, multiplication and division of rational expressions.
Taxonomic Hierarchy Categories were also introduced by Linnaeus. They are also known as Linnaean hierarchy. It is defined as sequence of categories in a decreasing or increasing order from kingdom to species and vice versa. Kingdom is the highest rank followed by division, class, order, family, genus and species.Species is the lowest rank in the Hierarchy.The hierarchy has two categories which are obligate and intermediate.Obligate means they are followed strictly and range from kingdom to species as said above.pecies is the lowest rank in the Hierarchy. The hierarchy has two categories which are obligate and intermediate. Obligate means they are followed strictly and range from kingdom to species as said above.
Hierarchy is simply defined as any system of persons or things ranked one above another. It is a system that helps us define order and organization.apping Web Site Hierarchy. In the above example, we see the benefits of mapping â the structure is clearly defined and we can easily tell if anything is out of place or breaks the pattern of shifting emphasis. This is also a good example for defining important components of a successful hierarchy â the peak and baseâ¦.