Solenocytes differ from flame cells in

Options

A. Absence of cilia
B. Absence of connection with excretory canals
C. Presence of blood vessels
D. All the above .

Answer

To answer the question about how solenocytes differ from flame cells, we can break down the information step by step.

### Step-by-Step Solution:

1. **Definition of Solenocytes**:
- Solenocytes are specialized cells associated with excretion, osmoregulation, and ion regulation in certain organisms, particularly within the subphylum Cephalopoda.
- They are characterized by their flagellated structure, which aids in their function, but notably, they lack cilia.

2. **Definition of Flame Cells**:
- Flame cells are found in simpler freshwater invertebrates and function similarly to kidneys, helping to remove waste from the body.
- Unlike solenocytes, flame cells are ciliated, meaning they have hair-like structures (cilia) that help in their function.

3. **Comparison of Features**:
- **Cilia**: Solenocytes do not have cilia, while flame cells do.
- **Connection to Excretory Canal**: Solenocytes are not connected to an excretory canal, whereas flame cells typically are.
- **Presence of Blood Vessels**: The presence of blood vessels is not a distinguishing feature mentioned in the context of this comparison.

4. **Conclusion**:
- Based on the differences outlined, the primary distinction is that solenocytes lack cilia, while flame cells possess them. Therefore, the correct answer to the question is that solenocytes differ from flame cells in the absence of cilia.

### Final Answer:
Solenocytes differ from flame cells in the absence of cilia.

---