[Campbell Biology P.747] Based on the description and Figure 33.13, which feature is charact... | Practice Question

Based on the description and Figure 33.13, which feature is characteristic of acanthocephalans and gives them their common name 'spiny-headed worms'?

  • A: A U-shaped alimentary canal for efficient digestion.
  • B: Curved hooks on the proboscis at the anterior end of their body.
  • C: A hinged shell with dorsal and ventral parts.
  • D: Ciliated tentacles forming a lophophore for feeding.

Explanation

The text states: 'They are commonly called spiny-headed worms because of the curved hooks on the proboscis at the anterior end of their body Figure 33.13 .' Figure 33.13 clearly shows these hooks.