Definition of a Tangent Plane We all have and intuitive idea of what the tangent plane to a point on a given surface should be. It is the plane that goes through that point and that it is tangent to the surface at that point. Suppose. z = f(x,y) is a smooth surface above the xy-plane (see the picture below).
The two prokaryotic domains (or empires),  Bacteria  (or  Eubacteria ) and  Archaea  (or  Archaeobacteria ), are subdivided into 35 phyla (or divisions): 30 phyla in the domain  Bacteria , and 5 phyla in the domain  Archaea .
Animal Kingdom. The Animal Kingdom is split into several Phyla. Each Phylum group contains organisms that have things in common. Below is a list of some animal Phyla: Chordate Phylum: All the animals which have a backbone. Includes: Fish, Reptiles, Birds, Amphibians, and Mammals.nstead of Phyla, the Plant Kingdom is split into Divisions. Each Divsion group contains organisms that have things in common. Below is a list of some plant Divisions: Magnoliophyta Division: All flowering plants. These plants have leaves, stems, and roots.