Which is associated with pearl formation ?

Options

A. Pecten
B. Ostrea
C. Nautilus
D. Pinctada

Answer

**Step-by-Step Solution:**

1. **Understanding Pearl Formation**: Pearls are formed within the soft tissue of a living shelled mollusk, such as oysters. The process begins when an irritant, such as a grain of sand or a parasite, enters the mollusk's shell.

2. **Role of the Mantle**: The mantle is a significant part of the mollusk's anatomy. It is a layer of tissue that covers the internal organs and is responsible for the secretion of the shell.

3. **Nacre Secretion**: When an irritant is detected, the mantle secretes layers of nacre (also known as mother-of-pearl), which is made up of calcium carbonate. This secretion forms around the irritant.

4. **Formation of the Pearl**: Over time, as more layers of nacre are added, the irritant becomes encased in a smooth, lustrous pearl. This process can take several years.

5. **Identifying the Correct Option**: In the context of the question, the correct answer is "Incathedra" (option D), which refers to the mantle tissue that plays a crucial role in pearl formation.

**Final Answer**: The process associated with pearl formation is linked to the mantle of the mollusk, specifically referred to as "Incathedra."

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