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.

[EX Q]: Fact: Vertebrates are all chordates that have a spinal column. 
Question: What do all vertebrates have that invertebrates don't?
[EX A]: a spinal column.

[EX Q]: Fact: Each starfish arm contains part of the water vascular system. 
Question: Where does a starfish have its water vascular system?
[EX A]: in its arms.

[EX Q]: Fact: plants' anchors have primary and secondary meristems for growth and length and width into the ground. 
Question: What have primary and secondary meristems for growth and length and width into the ground?
[EX A]:
plants' anchors.