Multiple choice

Tube feet are characteristic of

  1. star fish

  2. cuttle fish

  3. cray fish

  4. jelly fish
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A Correct answer
Explanation

Tube feet (podia) are characteristic locomotory and respiratory structures unique to echinoderms, and star fish (asteroids) prominently display these features on their aboral surface. Tube feet operate through a hydraulic water vascular system. The other animals listed are not echinoderms: cuttle fish and jelly fish belong to Mollusca and Cnidaria respectively, and cray fish is a crustacean arthropod.

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