Islam is a religion of reason and logic, hence its acceptance of concrete scientific information, but theories that conflict with the very basis of the Muslim faith are quickly dismissed.
“Your Guardian-Lord is Allah, who created the heavens and the earth in six days...he has created man... and cattle he has created…he who created night and the day, and the sun and the moon…” (Surah 7:54, 16:4-5 and 21:33). Many Muslims will take these verses to mean that everything in existence was concocted by the hands of God, therefore nothing has or can change in respect to his creations.
While it is true that everything was created by God, the perception that none of his creations have changed is utterly false. Animals have evolved to a certain degree in order to survive and better fit the environments in which they reside. This doesn’t mean that we accept the notion that humans originated from monkeys through a lengthy series of evolution; that idea goes against Islam’s creationist nature.