I've been thinking about this and haven't come up with a satisfactory answer. The Battlestar Galactia crew believes in evolution since Lee says the human critters they encounter are at the "pre-verbal" stage of evolution and Saul finds it amazing that humans evolved independently on another planet, but the repeated destruction of civilization and the distribution of Galactia humans around the planet is a lot like Cuvier's catastrophism and the distribution of species, i.e. God periodically wipes a species out and then plops down pre-formed critters on different continents and, voila, that's what people and animals have looked like since the day they appeared on Earth. This coupled with the explanation that a higher power is directing all of this....well, I wonder if this was intentional or an accident of trying to wrap up the story as fast as possible.

Yeah, poignant moments are great, but what they didn't show was the other 38,000 people desperately trying to ferment grass, tree bark, prehistoric water buffalo milk....