What scientific objections exist against theistic evolution?

There is already a question focused on biblical arguments, *https://christianity.stackexchange.com/q/6908/61679* , but I found none focused on scientific reasons. According to creationists, are there scientific grounds for being skeptical of the view that God used Darwinian mechanisms to bring about the diversity of life we see today from a common ancestor? What are the main scientific arguments that creationists put forward to challenge [theistic evolution](https://en.wikipedia.org/wiki/Theistic_evolution) ?