Multiple choice

Natural pearl belongs to which of the following phylums?

  1. Arthropoda

  2. Mollusca

  3. Echinodermata

  4. Protozoa

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pinctada is a genus of saltwater clams (marine bivalve molluscs) in the family Pteriidae, the pearl oysters. These oysters have a strong inner shell layer that is composed of nacre, also known as mother of pearl.

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