Question

multiple choice question
what chordates have a cranium and gills but lack vertebrae?
lanceletssharkslampreyshagfishes

Explanation:

• Lancelets lack a cranium.
• Sharks have vertebrae.
• Lampreys have vertebrae (modified from notochord).
• Hagfishes have a cranium (protecting brain), gills (for respiration), and lack vertebrae (they are in the class Myxini, which is a group of jaw - less chordates without true vertebrae).

Answer:

hagfishes