Evolutionary convergence is characterized by

The structures in different organisms which are not similar anatomically though they perform similar functions are called as analogous organs. The anatomically different structures evolved towards the same direction (i.e., towards the same function) due to adaptations to similar needs or similar habitats. This is called the convergent evolution because anatomically dissimilar and origin wise different structures converged towards the common function. Hence, analogous structures are the result if convergent evolution. Eye of the octopus and of mammals, flippers of penguins and dolphins, sweet potato and potato, etc., are the examples of analogous structures.