The function of nematoblast in coelenterate is

Options

A. Locomotion
B. Offence & defence
C. Reproduction
D. Nutrition

Answer

### Step-by-Step Solution:

1. **Understanding Nematoblasts**:
- Nematoblasts are specialized cells found in coelenterates (also known as cnidarians) such as jellyfish, sea anemones, and corals. These cells are also referred to as cnidocytes.

2. **Function of Nematoblasts**:
- The primary function of nematoblasts is related to offense and defense. They contain stinging structures called nematocysts, which can inject toxins into prey or potential threats.

3. **Evaluating Options**:
- **Locomotion**: This option is incorrect because locomotion in coelenterates is primarily achieved through muscle fibers and tentacles, not nematoblasts.
- **Offense and Defense**: This is the correct answer. Nematoblasts help in paralyzing prey and defending against predators.
- **Reproduction**: This option is also incorrect. While coelenterates can reproduce, nematoblasts are not involved in the reproductive process.
- **Nutrition**: This option is incorrect as well. Nematoblasts do not play a direct role in nutrition; they are primarily for capturing prey.

4. **Conclusion**:
- Based on the evaluation of the options, the correct function of nematoblasts in coelenterates is for offense and defense.

### Final Answer:
The function of nematoblast in coelenterates is for offense and defense.

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