When the walls of the excavations are to be kept vertical and in order to protect the safety of. workmen, the general public, this or other work or structures, or excavation walls, or pipe. installation including ma terials encountered in the excavation which have a tendency to slough.
Hierarchy of Living Things. Biological organization, or the hierarchy of life, is the hierarchy of complex biological structures and system that define life using a reductionistic approach. The traditional hierarchy, as detailed below, extends from atoms (or lower) to biospheres.
A hierarchy is an organizational structure in which items are ranked according to levels of importance. Most governments, corporations and organized religions are hierarchical. A hierarchy is an organizational structure in which items are ranked according to levels of importance. Most governments, corporations and organized religions are hierarchical. In a computing context, there are various types of hierarchical systems. Most file systems, for example, are based on a hierarchical model in which files are placed somewhere in a hierarchical tree model. A file is placed in a directory (folder in Windows) or subdirectory at the desired place in the tree structure.