In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: One of the main features all vetebrates have in common is what? Answer: backbone

A: One of the main features all vetebrates have in common is a backbone.
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Q: Question: What is the diploid number for fruit flies? Answer: 8

A: 8 is the diploid number for fruit flies.
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Q: Question: The number of particles of a substance in a given volume is known as? Answer: concentration

A:
The number of particles of a substance in a given volume is known as the concentration.
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