Final answer:
A hair with a multiserial medulla could belong to a human, dog, or bear.
Step-by-step explanation:
A hair with a multiserial medulla could belong to a human, dog, or bear. The multiserial medulla is a structure in the hair shaft that is characterized by multiple rows of cells running along the medulla. It is commonly found in the hair of certain animal species, including humans, dogs, and bears.
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