No.>>58273202>So then what species of ape did they evolve from?
They didn't. They are a divine creation made by a god. Just like all the other races.>Are elves human?
Your first mistake was trying to shoehorn your meager knowledge of how the world works into the fantastical and magical realm that these races exist in. They are not humans, but can breed with them because they are compatible on some level. It is not genetics, otherwise dragons would be human, but they aren't. So it must be some other means of mixing.
There are many ways in which you can make a race or species mix with another seemingly incompatible one. The first is simply divine decree, that the gods will it so, so it happens. Obviously this isnt going to sate your idiocy. So let's go with something more interesting. Rupert Sheldrake is a "scientist", a crank, a loon, who has come up with his own "theory" about how life evolved and how it changes down through heredity. His pseudoscientific "theory" is called morphogenic field theory. Basically all creatures emit a special field (basically a soul without being a soul) around them that tells their cells what shape and configuration their body should be. Why can a human and and an orc breed? Because their fields are compatible, resulting in a mixed field that results in half orcs. This also explains half dragons, half celestials, and all the other weird hybrids, along with polymorph magics that can change your shape and even species.
Evolution is a basic, tired, high school knowledge level idea for how races mix or evolve. Go weird, go interesting, go with pseudoscience and folklore and mythic narratives.