Which one belongs to hemichordata

The correct Answer is:B

To determine which organism belongs to the phylum Hemichordata, we can analyze the options provided: Cellpa, Belanoglossus, Petromyzon, and Myxin.

1. Understand the Phylum Hemichordata:
- Hemichordata is a separate phylum that includes marine organisms known for their worm-like shape and specific body structure.

2. Identify the Options:
- Cellpa: This is not a recognized organism in biological taxonomy.
- Belanoglossus: This is a well-known genus within the phylum Hemichordata.
- Petromyzon: Commonly known as lampreys, these belong to the phylum Chordata.
- Myxin: This refers to hagfish, which also belong to the phylum Chordata.

3. Analyze Each Option:
- Cellpa: Not relevant to Hemichordata.
- Belanoglossus: Confirmed to belong to Hemichordata.
- Petromyzon: Confirmed to belong to Chordata.
- Myxin: Confirmed to belong to Chordata.

4. Conclusion:
- The only organism from the options that belongs to Hemichordata is Belanoglossus.

Final Answer:
Belanoglossus belongs to Hemichordata.

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