Alphysia shows all of these properties , except

Options

A. Organ system level of organization
B. Segmentation
C. Bilateral symmetry
D. Triploblastic coelomate

Answer

To solve the question regarding the properties of Alphysia (commonly known as sea hares), we need to analyze the given options and determine which one does not apply to this organism.

### Step-by-Step Solution:

1. **Identify the Organism**:
- Alphysia belongs to the phylum Mollusca and is commonly referred to as sea hares.

2. **Evaluate the Options**:
- **Option 1: Organ system level of organization**:
- Alphysia has an organ system level of organization, meaning its cells are organized into tissues, tissues into organs, and organs into organ systems. This is a characteristic of higher organisms, including mollusks.

- **Option 2: Segmentation**:
- Alphysia is unsegmented. Unlike organisms that exhibit segmentation (like annelids), sea hares do not have a segmented body structure. This is a key point to note.

- **Option 3: Bilateral symmetry**:
- Alphysia exhibits bilateral symmetry, which means its body can be divided into two equal halves along a single plane. This is typical for many mollusks.

- **Option 4: Triploblastic**:
- Alphysia is triploblastic, meaning it has three germ layers: ectoderm, mesoderm, and endoderm. This is a common characteristic of higher animals, including mollusks.

3. **Conclusion**:
- After evaluating all the options, we find that Alphysia does not exhibit segmentation. Therefore, the correct answer to the question is **Option 2: Segmentation**.

### Final Answer:
**The property that Alphysia does not show is segmentation.**