The largest nematoblast is

Options

A. Stenotele
B. Desmoneme
C. Small glutinant
D. Large glutinant.

Answer

**Step-by-Step Solution:**

1. **Understanding Nematoblasts**: Nematoblasts, also known as cnidocytes or stinging cells, are specialized cells found in cnidarians, which include organisms like Hydra, jellyfish, and corals. These cells contain a structure called a nematocyst, which can inject toxins into prey.

2. **Identifying the Options**: The options given are:
- Stenoteal
- Desmonium
- Small glutinant
- Large glutinant

3. **Analyzing Each Option**:
- **Stenoteal**: This is identified as the largest nematoblast and is characterized by a spirally coiled thread that is highly poisonous. It is located at the distal end of the Hydra and is used to capture prey.
- **Desmonium**: This is a type of nematoblast that is also thread-like but is not as poisonous as stenoteal. It is present in matured cnidarians and helps in coiling around prey but is not the largest.
- **Small Glutinant**: This type of nematoblast has a sticky surface that helps in capturing prey but is small in size.
- **Large Glutinant**: Similar to small glutinant, this has a sticky surface but is larger in size than small glutinant, yet still not the largest nematoblast.

4. **Conclusion**: Based on the analysis, the largest nematoblast is **Stenoteal**. It is the most effective in capturing prey due to its size and poisonous nature.

**Final Answer**: The largest nematoblast is **Stenoteal**.

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