Excretory organs of Unio are

Options

A. Organs of Bojanus
B. Keber's organ
C. 1) and 2)
D. Malpighian tubules

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the excretory organs of Unio, which is a type of freshwater bivalve mollusk commonly found in ponds, rivers, and lakes.

2. **Habitat and Behavior**: Unio is typically found in muddy substrates and is a sedentary organism. It can move out of the mud using its muscular foot.

3. **Excretory Organs**: The excretory organs of Unio include a pair of kidneys. These kidneys are essential for the removal of waste from the organism's body.

4. **Specific Names of Organs**: The kidneys in Unio are referred to as "organ of Bojanus." Additionally, there is a pericardial gland, also known as the "cerebral organ," which assists in the excretion process.

5. **Functionality**: Both the kidneys and the pericardial gland work together to ensure effective waste removal from the body of Unio.

6. **Conclusion**: Therefore, the excretory organs of Unio are the pair of kidneys (organ of Bojanus) and the pericardial gland.

**Final Answer**: The excretory organs of Unio are the kidneys (organ of Bojanus) and the pericardial gland.

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