A hexahedron (plural: hexahedra) is any polyhedron with six faces. A cube, for example, is a regular hexahedron with all its faces square, and three squares around each vertex. There are seven topologically distinct convex hexahedra, one of which exists in two mirror image forms.
Some bacteria that can help the environment are called decomposers. They are nature's recyclers! They return basic chemicals to the environment for living things to reuse! For example, the leaves of many trees die in the Autumn and drop to the ground.ome bacteria that can help the environment are called decomposers. They are nature's recyclers! They return basic chemicals to the environment for living things to reuse! For example, the leaves of many trees die in the Autumn and drop to the ground.
Not all bacteria form capsules but in those that do the capsule is the interface between the bacterial cell and the external environment. As such it may serve a diversity of functions in disease including: 1. Antiphagocytosis - the smooth nature of the capsule prevents the phagocyte from adhering to and engulfing the bacterial cell. Furthermore, opsonins are prevented from binding to the cell and the process of opsonization is hindered.