Why can't we just say that God controls biology and therefore anything produced by biological processes was made by God?
You can. But this isn't about whether everything was made by God (though I'm sure you can guess what I believe on that subject,
) it's about whether we/animals are made in his image.
So you're saying that only humans as they are right now are in the image of God? At no point in the past were we in the image of God? Because if you go back to the last branch in the evolutionary tree, you have a fork, one side us, the other a different species, and the original branch before the split. Is the original branch not in the image of God? Why wouldn't the other side of the fork also be in the image of God?
If you avoid this by saying that we are only in his image at this moment in the evolutionary timeline, then what about in the future? And why, precisely, are our fore bearers not also in his image?
We don't know exactly where the dividing line is between "in His image" and "not in His image". Now, a question for you: When did pre-human primates become human? Why are all of our distant ancestors not human, too?
Because they're different from what we see ourselves as at the moment. They're the origin for us that, through time, had the rough edges worn a bit. Not all of them are by any means worn off yet though.
My question remains. Why aren't our fore bearers in God's image too? If he didn't create us in his image, then we weren't made in his image. If we're in his image only now, then the next change is going to make us no longer be in his image. If evolution is the tool God used to shape us into his image, it's an unpredictable one. Human evolution hasn't stopped, it's still on-going. Why is God now changing us away from his Image? Has his image changed? Is God then subjective?
Besides that, what in blazes does it mean that we're in the image of the metaphysical? Is God humanoid in form? How can the metaphysical look like the physical?
A lot of things can be read into the smallest detail, can't they