Chidoblasts are used for

Options

A. Capture of the prey
B. Anchorage
C. Defense
D. All of the above

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Nidoblasts":**
- Nidoblasts, also known as nematoblasts or nematocysts, are specialized cells found in certain organisms, particularly in the phylum Cnidaria, which includes jellyfish, corals, and sea anemones.

2. **Identifying the Structure of Nidoblasts:**
- Nidoblasts consist of a capsule, a shaft, and a thread tube. This structure is crucial for their function.

3. **Functions of Nidoblasts:**
- **Capture of Prey:** The primary function of nidoblasts is to capture prey. When triggered, the nematocyst can discharge its thread, which can entangle or immobilize the prey.
- **Defense:** Nidoblasts also serve a defensive role. The stinging mechanism can deter predators, providing a protective function for the organism.
- **Encouragement (or Adhesion):** In some contexts, nidoblasts can aid in adhesion, helping the organism to stick to surfaces or capture prey more effectively.

4. **Conclusion:**
- Given that nidoblasts perform all three functions—capturing prey, providing defense, and aiding in adhesion—the correct answer to the question is "all of the above."

### Final Answer:
Nidoblasts are used for capturing prey, defense, and encouragement (adhesion), making the correct answer: **All of the above.**

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