Well, there's "intelligent design" and there's "intelligent design". That is, the whole universe I consider to be an intelligent design by God . . . but the fact that planets and stars turn out to be in those awesomely spherical shapes is not because God ponders anew in every case how to make the thing, but rather in the working out of the laws of physics He has put into place, i.e. enough matter gathers, gravity pulls it into a sphere.
So I admire God's design as I watch the planets and yet accept a completely natural explanation for the forms the planets take.
in the same way, as we look to the designs we find in biology, many of them have a naturalistic explanation.
Nobody knows how to program a nerve-net to make it possible for a spider to weave a web without any instruction from its parent - yet it does so generation after generation, with patterns specific to each species.
Therefore, it must be possible to specify, in inheritance, how to do that.
Complex inheritances can be created by evolution. Evolution, of course, is simply our way of describing how God has created all life on earth through common descent. Working out the science and the laws of evolution is an exercise in learning to admire still more the works of God.