Form the following select the characteristic features that is not correct for Balanoglossus?

Options

A. Belongs to phylum that links non-chordates to chordates.
B. Excretory organ is proboscis gland.
C. Circulatory system is closed type.
D. Fertilisation is external.

Answer

To solve the question regarding the characteristic features of Balanoglossus, we need to evaluate each option provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Identify the Organism**:
- Balanoglossus is a member of the phylum Hemichordata.

2. **Evaluate Option A**:
- **Statement**: "Belongs to a phylum caudata that links non-caudates to caudates."
- **Analysis**: Balanoglossus was previously considered a subphylum under Chordata but is now classified as a separate phylum (Hemichordata). It does serve as a connecting link between non-caudates and caudates.
- **Conclusion**: This statement is **correct**.

3. **Evaluate Option B**:
- **Statement**: "Excretory organ is proboscis gland."
- **Analysis**: The excretory organ in Balanoglossus is indeed the proboscis gland.
- **Conclusion**: This statement is **correct**.

4. **Evaluate Option C**:
- **Statement**: "Circulatory system is closed type."
- **Analysis**: Balanoglossus has an open circulatory system, not a closed one. In an open system, blood flows directly into the body cavity.
- **Conclusion**: This statement is **incorrect**.

5. **Evaluate Option D**:
- **Statement**: "Fertilization is external."
- **Analysis**: Fertilization in Balanoglossus is indeed external.
- **Conclusion**: This statement is **correct**.

6. **Final Answer**:
- The characteristic feature that is **not correct** for Balanoglossus is **C. Circulatory system is closed type**.

### Summary:
- The correct answer is **C**.