It's hard to say for sure. The bible has no historical evidence to support it. It's a series of stories that had been passed down father to son in the tribe until someone was able to put it on paper. There is no evidence to prove creation, to prove god. Evolution on the other hand is something we can witness and can prove. We can see it happen in humans, for instance, each generation is taller and stronger than the previous one. And we can trace our DNA back, through the mothers genes, to a common ancestor. And since so many of our genes match those of the primates, it seems logical that at some point in the distant past, we may have been one species, But it is just theory.