All of them assuming that life-creation basically got right to present-day creatures from the start (with a few rare stories where a particular new species is created in a myth in an almost evolution-life story).
That depends on how literally you read the bible, and how well you assume it was translated between the first writings (or probably, oral retellings of prior traditions) and the first writings which we have today. There has been substantial drift since those writings, why not before? If you just read "day" as "period" in the Christian creation myth, it becomes less ludicrous. It could be valid enough, then, from the right viewpoint. Maybe night is defined by sleep. And it leaves out whole stories of how things were done, but that's not surprising.
I'm not putting forth any theories here, but if the Earth were "created" (made over) by a superior being (alien with technology we have yet to develop) and seeded with life forms which evolved into what we see today, a few retellings slanted towards particular political aims could have resulted in the Holy Bible that we know and, uh, love, today.
I don't believe that there's necessarily any validity to Christian mythology, but there's no particular reason to believe that it's completely wrong either. The parts which seem to correspond to known historic events don't support the rest of the material, but at least it shows that some of what's in there isn't bullshit. Sadly, the parts which clearly are certainly make it much more difficult to take any of it seriously, when examined objectively. Each claim has to be examined individually, which makes it basically worthless.