Representative of hemichordata is

Options

A. Scoliodon
B. Myxine
C. Balanoglossus
D. Petromyzon

Answer

**Step-by-Step Solution:**

1. **Understanding Hemichordata**: Hemichordata is a subphylum that serves as an evolutionary link between invertebrates and vertebrates. It exhibits characteristics of both groups.

2. **Key Characteristics**: The main characteristic of Hemichordata is the presence of a notochord, which is found only in the upper part of the body. However, unlike true chordates, Hemichordates do not possess a nerve cord.

3. **Body Structure**: Hemichordates have a distinct body structure that includes three main parts: the proboscis, collar, and trunk. This structure reflects their unique position in the animal kingdom.

4. **Identifying Representatives**: To identify a representative of Hemichordata, we need to look at the options provided:
- Scoliodon: This is a shark and belongs to Chordata.
- Myxine: This is a jawless fish that belongs to the subphylum Agnatha under Chordata.
- Belanoglossus: This organism is a member of Hemichordata.
- Petromyzon: This is also a jawless fish that belongs to Agnatha under Chordata.

5. **Conclusion**: Among the given options, the representative of Hemichordata is **Belanoglossus**.

---