There are three components to the theory of evolution, 2 are undisputed facts that everyone will agree with and the third has not been observed (probably because of how rare it really is)
1) A wide variety of physical traits of all creatures are inherited from their parents
2) If a trait leads to individuals who have it dying before they have the opportunity to reproduce the trait will eventually disappear
3) Over long periods of time, new traits can be introduced that (if advantageous) could spread throughout the population potentially leading to a new species
I don't think any creationists are going to argue 1 or 2 ...
With 3 I would argue that we constantly see the results of newly introduced traits but the vast majority would be labelled genetic disorders because it is far more likely to introduce a detrimental disorder than an advantageous trait; and the vast majority of advantageous adaptations would likely not be caught by the fossil record because they would be a modification within soft tissue.







