(a) In the given flow chart, A is Characterisation, B is Classification and C is Nomenclature.
(b) In systematic study, the organism to be studied is described for all its morphological and other characteristics and based on that identification is done. Then the organism is classified (B) on the basis of its resemblance to different taxa. Sometimes, it is possible that the organism may not resemble any existing taxa or groups. A new taxa or group is raised to accommodate it.
(c) Two types of names have been given to organisms-common or vernacular and scientific. Vernacular names are given to the organisms in a particular language and region of the world. A scientific name is the one which is given by biologist and is understood to represent a particular organism in every part of the world. It is advantageous over the vernacular names. Every species has a single and specific scientific name.
