Creationism is not entirely religious based. Science also plays a part.

If I asked you where did everything come from, you would have to give an idea that requires a leap of faith. Or you would have to say, I don't know.

Adapting creatures is one thing. But do these fruit flys grow things that weren't there? Do they grow fangs? Develope an anti something or other for the problems they are faced?

From what I have been told, my bible teacher was a evolution biologist major(if thats the title) there is evolution, but its called de-evolution. For instance if the wings of a lady bug, keep getting caught into the wind, and getting swept into the water to drown.Then they will adapt and loose the wings.
But from what I have been told, it doesn't work the other way.
Like the gazelle won't develope wings to fly away, or grow some kind of weapon from its body.