Tornaria, the larva of Balanoglossus which resembles with bipinaria larva was first described by

Options

A. J.Muller
B. Weismann
C. Hugo de Vries
D. Singer

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the scientist who first described the Tornaria larva of Balanoglossus, which resembles the Bipinaria larva.

2. **Identifying the Options**: The options provided are:
- A. J. Muller
- B. Weizmann
- C. Hugo de Vries
- D. Singer

3. **Researching Tornaria**: Tornaria is a larval form of Balanoglossus, which is a member of the phylum Hemichordata. It is known for being planktonic and feeding on plankton.

4. **Understanding Bipinaria**: The Bipinaria larva is the larval stage of echinoderms, particularly starfish. There is a noted resemblance between Tornaria and Bipinaria.

5. **Historical Context**: J. Muller is credited with the first description of the Tornaria larva in 1850. This is significant as it establishes the connection between the two larval forms.

6. **Conclusion**: Based on the historical context and the information gathered, the correct answer to the question is J. Muller.

**Final Answer**: The scientist who first described the Tornaria larva of Balanoglossus is **A. J. Muller**.

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