Multiple choice

Which of the following is the genus of pen shells?

  1. Mya

  2. Octopus

  3. Vema

  4. Solen

  5. Pinna
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E Correct answer
Explanation

Pinna is a genus of pen shells. It is a cosmopolitan genus of bivalve molluscs characterised by elongated and wedge-shaped shells, which most commonly stand point-first in the sea bottom in which they live, anchored by a net of byssus threads.

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