instruction:
Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.
question:
Fact: Introns are areas that do not code for proteins. 
Question: Introns are areas that?
answer:
do not code for protein.


question:
Fact: An animal requires oxygen for survival. 
Question: What does an animal need for survival?
answer:
Oxygen.


question:
Fact: Keratin prevents injury by forming protective plates over the ends of the fingers. 
Question: What prevents injury by forming protective plates over the ends of the fingers.?
answer:

keratin.