Multiple choice

Which of the following is not a mollusc?

  1. Chiton

  2. Pila

  3. Prawn

  4. Unio
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chiton, Pila (apple snail), and Unio (freshwater mussel) are all molluscs - they belong to the phylum Mollusca. Prawn, however, is an arthropod (class Crustacea). Arthropods have jointed legs and an exoskeleton, while molluscs have a muscular foot and soft body. The prawn is the odd one out because it belongs to a completely different phylum.

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