Classification is categorizing organisms in taxonomic groups according to their observed similarities for ease of understanding while evolution is the change in heritable characteristics over a number of generations.

The modern classification system is based on the phylogenetic resemblances and evolutionary relationships between the different species of organisms present in the world. The more common characteristics two species have, the more closely related are they. Thus, evolution of organisms gives us a knowledge about the position of the organism in the modern system of classification and is a reflection of the classification. So, it can be said that evolution and classification are interlinked.