<Dl> <Dd> square ⊂ quadrilateral ⊂ polygon ⊂ shape (\ displaystyle (\ text (square)) \ subset (\ text (quadrilateral)) \ subset (\ text (polygon)) \ subset (\ text (shape)) \,) </Dd> </Dl> <Dd> square ⊂ quadrilateral ⊂ polygon ⊂ shape (\ displaystyle (\ text (square)) \ subset (\ text (quadrilateral)) \ subset (\ text (polygon)) \ subset (\ text (shape)) \,) </Dd> <P> A square can always also be referred to as a quadrilateral, polygon or shape . In this way, it is a hierarchy . However, consider the set of polygons using this classification . A square can only be a quadrilateral; it can never be a triangle, hexagon, etc . </P> <P> Nested hierarchies are the organizational schemes behind taxonomies and systematic classifications . For example, using the original Linnaean taxonomy (the version he laid out in the 10th edition of Systema Naturae), a human can be formulated as: </P>

Give then define the different biological levels of organization