I believe many people if asked 'which species is the most evolved' would answer 'human'

But what is the measure of 'most evolved'

If "the most evolved" means the species with the most population, then 'bacteria' is likely the most evolved, as their are millions (billions?) more bacteria then humans

If "the most evolved" means the longest lifespan, again humans loose, their are many species of trees for example that have lived for well over 300 years (when humans are not cutting them down'

If "top of the food chain" is the answer, again, throw the average human out into a wild forest, it becomes clear that he is not at the top of the food chain. Often it takes multiple humans together to defeat other animals, OR a specific technology that human uses (eg: gun), but the human with the gun was not the human that invented it.

If mutations in genes lead to changes, some of which survive and some of which do not, is it even possible to rate a 'level' of evolution? Are some species even more evolved then others? Are the 'extinct' species the ones that were 'less evolved'??