Notochord like structure of hemichordates is

Options

A. Protochord
B. Stomochord
C. Pallium
D. Glomerulus

Answer

**Step-by-Step Solution:**

1. **Understanding Hemichordates**: Hemichordates are a group of marine animals that share some characteristics with chordates but do not possess a true notochord. Instead, they exhibit a structure that serves a similar function.

2. **Identifying the Structure**: The structure in hemichordates that resembles a notochord is known as the stomochord. This is a rod-like structure that provides support, similar to the role of a notochord in true chordates.

3. **Evaluating the Options**: The question provides several options:
- A. Stomochord
- B. Protochord
- C. Perium
- D. Glomerulus

4. **Analyzing Each Option**:
- **Protochord**: This term refers to an informal grouping of organisms that includes hemichordates, urochordates, and cephalochordates. It is not a structure.
- **Perium**: This is a term related to the brain (specifically the cerebrum) and is not related to the notochord.
- **Glomerulus**: This is a structure found in the kidney, specifically in the nephron, and is unrelated to notochords.

5. **Conclusion**: Based on the analysis, the correct answer to the question regarding the notochord-like structure in hemichordates is the stomochord.

**Final Answer**: The notochord-like structure of hemichordates is the **stomochord**.

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