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 .
1) An example of eubacteria is the blue green algae with the scientific name cyanobacteria. Blue green algae are unicellular prokaryotic cells which are very small. They do have a cell membrane, cell wall and DNA, but they donât have a nucleus.It is classified in the eubacteria kingdom because it is a unicellular, prokaryotic organism. They are producers (photosynthetic bacteria). 2) Another example of eubacteria is Salmonella with its scientific name Salmonella typhi.he common name is fungi, and so is the scientific name. A fungus is any organism that gets its food by absorbing nutrients from and breaking down the bodies of dead/dying plants or animals. They suck up food from tiny threads called hyphae. This means theyâre decomposers, or heterotrophs.