Multiple choice

All of the following are arthropods except

  1. Clam worms

  2. Centipedes

  3. Crabs

  4. Spiders

  5. None of these
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A Correct answer
Explanation

Clam worms (polychaete annelids) are segmented worms, not arthropods. Arthropods are characterized by jointed appendages, segmented bodies, and exoskeletons made of chitin. Centipedes, crabs, and spiders are all arthropods - centipedes and millipedes are myriapods, crabs are crustaceans, and spiders are arachnids.

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