I know teachers who work hard to enter the particular moral worlds of students. A high school teacher recently told me about his efforts not to condone but to understand why a student he admired had brought a gun to school.
In biological classification, rank is the relative level of a group of organisms (a taxon) in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, order, class, phylum, kingdom, domain, etc. A given rank subsumes under it less general categories, that is, more specific descriptions of life forms.
1 Within each of the three domains, we find kingdoms, the second category within taxonomic classification, followed by subsequent categories that include phylum, class, order, family, genus, and species.  At each classification category, organisms become more similar because they are more closely related.