Flame cells (solenocytes) are excretory structures of

Options

A. Annelida
B. Arthropoda
C. Flat worms
D. Crustaceans (prawn)

Answer

**Step-by-Step Solution:**

1. **Understanding Flame Cells**:
- Flame cells, also known as solenocytes, are specialized excretory cells found in certain invertebrates. They play a crucial role in the excretion of waste products and osmoregulation.

2. **Identifying Organisms with Flame Cells**:
- Flame cells are primarily found in freshwater invertebrates. These include organisms such as flatworms (Platyhelminthes), which are known for their simple body structure and excretory systems.

3. **Analyzing the Options**:
- The question provides four options:
1. Nematoda (roundworms)
2. Annelida (segmented worms)
3. Platyhelminthes (flatworms)
4. Arthropoda (insects, arachnids, etc.)
- We need to determine which of these groups contains flame cells.

4. **Determining the Correct Answer**:
- Among the options, Platyhelminthes (flatworms) are known to possess flame cells as their excretory structures. Thus, the correct answer is option 3: Platyhelminthes.

5. **Conclusion**:
- Therefore, flame cells (solenocytes) are excretory structures of flatworms (Platyhelminthes).

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