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.

Q: Fact: heat is detected by sensory nerve cells. 
Question: What is detected by sensory nerve cells?

A: heat.
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Q: Fact: abalone  are invertebrates such as the common snail. 
Question: What are invertebrates such as the common snail?

A: abalone.
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Q: Fact: a disease that can be metastic occurs when the cell cycle is no longer regulated. 
Question: a disease that can be metastic occurs when the cell cycle is regulated how often?

A:
no longer.
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