They probably would. Though I don't think Scientologists have problems with evolution. At east, I haven't heard they do.
The official (ie 'gospel') view from L. Ron (though actually revealed by his son when doped to the max) was that man is descended from seaweed through jellyfish through clams through sloths through apes.
There's even a Wiki (with more of their 'sacred secrets'):
Scientology: A History of Man - Wikipedia