How can you study biology while denying evolution?
Unfortunately, the education system barely teaches students on the scientific process and definitions of scientific laws and theories. I don't know how many times I face palmed upon hearing evolution is just a theory.
Also many of these students intend to do medicine or engineering, Studies show that the highest percent of scientists who deny evolution are in the fields of medicine and engineering. The reason is probably because these applied sciences do not put much emphasis on the scientific method. Also, unsurprisingly, these fields also have the highest ratio of religious folk when compared to the natural sciences.