Number and arrangement of hooks present over rostellum of tapeworm are

Options

A. `12-22` in one whorl
B. `22-32` in two whorls
C. `22-32` in one whorl
D. `12-22` in two whorls

Answer

To answer the question regarding the number and arrangement of hooks present over the rostellum of a tapeworm, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The rostellum is a part of the tapeworm's scolex, which is the anterior end of the tapeworm. It is important to understand that the scolex is not the head but a specialized structure for attachment.

2. **Understand the Function**: The hooks and suckers present on the scolex are adaptations that allow the tapeworm to cling to the intestinal wall of its host. This is crucial for its survival as a parasite.

3. **Count the Hooks**: In the case of the pork tapeworm (Taenia solium), the rostellum contains approximately 22 to 32 small curved chitinous hooks.

4. **Arrangement of Hooks**: These hooks are arranged in two circles or whorls. The hooks in the posterior circle are smaller than those in the anterior circle.

5. **Conclusion**: Therefore, the number of hooks present over the rostellum of the tapeworm is 22 to 32, arranged in two circles.

### Final Answer:
The number and arrangement of hooks present over the rostellum of the tapeworm (Taenia solium) is approximately 22 to 32 hooks, arranged in two circles.

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