Test (tunic) of Herdmania is a thick protective covering. The test is composed of tunicine which is a

Options

A. protein
B. fat
C. polysaccharide
D. nucleic acid

Answer

To answer the question regarding the composition of the test (tunic) of Herdmania, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**:
- Herdmania is a solitary ascidian, which is a type of marine organism. It is important to know that it is exclusively marine and sessile, meaning it is fixed in one place.

2. **Understand the Structure**:
- The test or tunic of Herdmania serves as a thick protective covering for the organism. This tunic is crucial for its survival as it provides shelter.

3. **Composition of the Tunic**:
- The tunic of Herdmania is composed of a substance called tunicin. To determine what tunicin is made of, we need to analyze the options provided: protein, fat, polysaccharide, or nucleic acid.

4. **Determine the Correct Option**:
- Based on biological knowledge, tunicin is identified as a polysaccharide. Therefore, the correct answer to the question is that the test (tunic) of Herdmania is composed of tunicin, which is a polysaccharide.

5. **Function of the Tunic**:
- The tunic not only provides protection but also acts as a habitat for various small organisms, such as green algae and minute anemones, which can inhabit the surface of the tunic.

### Final Answer:
The test (tunic) of Herdmania is composed of tunicin, which is a polysaccharide.

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