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.

Fact: reindeer adapt to the Arctic's temperatures. 
Question: What adapts to the temperatures of the Arctic?
reindeer.

Fact: roots have different meristems. 
Question: What do roots have?
meristems.

Fact: Viruses are pathogenic organisms. 
Question: Viruses are what kind of organisms?

pathogenic.