By evolution, we assume you mean "turn into another species". If so ... But then neither has the mosquito "evolved", or the shark. At a genetic level changes a

By evolution, we assume you mean "turn into another species". If so ... But then neither has the mosquito "evolved", or the shark. At a genetic level changes are continuous in every organism and genetic changes can even happen as rapidly as from one generation to next. We may not see the molecular changes translate to the phenotype level but the changes are there. (See topic of epigenetics) Actually, you can see changes at phenotype level too (e.g body morphology of offspring affected by the diet of parents).