There are still tons of misconceptions floating around out there about what evolution is, and what it isn’t, so I think I should take it upon myself to provide a basic, and accurate, definition of evolution consistent with what we actually know to be true about evolution.
Evolution is simply the change in the frequencies of allele variations in any given population over time. An alternate definition of evolution is that evolution is simply descent with inherent modification, and the two separate definitions aren’t mutually exclusive.
Notice that neither of those definitions have anything to do with a “kind turning into a completely different kind”, such as the infamous Crocoduck of Kirk Cameron’s imagination, nor does it have anything to do with abiogenesis, the big bang theory, planetary formation, stellar nucleosynthesis, and the like. Evolution is solely an explanation of biodiversity, that’s it.
Perhaps the reader will be confused by how abiogenesis and evolution are two completely separate phenomena, so let me explain: Abiogenesis is about how life got here, while evolution only has to do with what happens after life got started in the first place. In other words, one needs a genome to evolve, something that prebiotic organic chemicals lack.
So it’s perfectly logically and theologically consistent for one to believe in both a deity and acknowledge evolution as the sole valid explanation for biodiversity, despite what the Fundies would have you believe.
A good source for understanding basic evolutionary biology can be found in the link below: