Question

how is variation and evolution interlinked? answer need fast

Answer 1

Every species or organisms has inbuilt tendency for genetic variation which plays an important role in the origin of new species and forms the the basis for evolution. Organisms appear to be same because of similarity in their inherited body designs.The more characteristics two species have in common, the more closely they are related. And they are likely to have a a common ancestor more recently. Classification of organisms necessarily involves, organizing them in different groups, based on the similarities and differences of characteristics. Classifying organisms helps us in recognizing the basic arrangement of a hierarchical structure among diverse species. It tells us about the resemblances and relationships between various organisms thus facilitating studies or research of wide variety associated with organisms effortlessly. In fact, classification of species is a reflection of their evolutionary relationship. Thus, we can say, the areas of study evolution and classification  interlinked

Answer 2

Variations led to a better life of an organism because variations increase the chance of survival for a particular organism for example there is a group of 10 red beetles. A crow eats 6 of them and somehow 4 beetles manage to survive and there genes change drastically and their color become green so that they would camouflage in green leaves and they survive and increase their population ....... if there are surviving organism .... they will further reproduce and due to variations their species will evolve. That's how these two things are interlinked to each other :)