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: Which sequence identifies the levels of organization of body structures in a human from simplest to most complex? Answer: cell → tissue → organ → organ system

A: The sequence cell → tissue → organ → organ system identifies the levels of organization of body structures in a human from simplest to most complex.
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Q: Question: Melanocytes are located in which layer of the epidermis? Answer: bottom

A: Melanocytes are located in the bottom layer of the epidermis.
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Q: Question: What is the name of the location in which a stream or river starts? Answer: source

A:
Source is the name of the location in which a stream or river starts.
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