Amphioxus belongs to

Options

A. Craniata
B. Hemichordata
C. Urochordata
D. Cephalochordata

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks to which group or classification amphioxus belongs.

2. **Review the Options**: The options provided are:
- Option 1: Craniata
- Option 2: Hemichordata
- Option 3: Urochordata
- Option 4: Cephalochordata

3. **Understand Amphioxus**: Amphioxus is a type of marine organism that is often studied in biology for its primitive chordate characteristics.

4. **Classify Amphioxus**: Amphioxus is classified under the subphylum Cephalochordata. This subphylum is part of the larger phylum Chordata.

5. **Eliminate Incorrect Options**:
- **Craniata**: This group includes vertebrates, which are more advanced than amphioxus.
- **Hemichordata**: This group is distinct from chordates and does not include amphioxus.
- **Urochordata**: This group includes tunicates, which are different from cephalochordates.

6. **Confirm the Correct Answer**: Since amphioxus has characteristics that align with the subphylum Cephalochordata, we conclude that the correct answer is Option 4: Cephalochordata.

7. **Final Conclusion**: Amphioxus belongs to the subphylum Cephalochordata within the phylum Chordata.

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