Most Christians believe in micro-evolution, gradual changes within species,such as gaining height over generations,but many do not believe that animals change into other types of animals,most especially when the alleged source of the change such as apes continue to exist.
I think you're looking for Creationists to explain it, not just any ol' Christian. The majority accept evolution. In fact, it seems to just be the U.S. lagging in acceptance of it.