Why Do Some Biologists Use the Name Craniata Instead of the Name

question 175

Multiple Choice

Why do some biologists use the name Craniata instead of the name Vertebrata?

• A)Hagfish have a cranium but no vertebrae.
• B)Hagfish are too different from Cephalochordates to be included in that group.
• C)Hagfish are not represented by very many species, therefore cannot be given their own taxonomic grouping.
• D)Hagfish are understudied, therefore can only be grouped with other taxa based on their lack of characteristics.

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