Columella auris is a modified

Options

A. Quadrate
B. Article
C. Hyomandibular
D. Sphenethmoid

Answer

To answer the question "Columella auris is a modified," we need to follow these steps:

### Step-by-Step Solution:

1. **Identify Columella Aurus**:
- Columella auris is a small rod-like bone found in certain animals, specifically in amphibians (like frogs), reptiles, and some fish.

2. **Understand its Function**:
- The primary function of the Columella auris is related to hearing. It plays a crucial role in transmitting sound vibrations from the environment to the inner ear.

3. **Relate to Other Structures**:
- The Columella auris is homologous to the stapes (or stirrup bone) found in mammals, which is also involved in the auditory system.

4. **Identify its Origin**:
- The Columella auris is a modification of the hyomandibular arch, which is part of the hyoid arch. This means it evolved from a structure that originally had a different function.

5. **Conclude the Answer**:
- Therefore, the correct answer to the question is that Columella auris is a modified **hyomandibular**.

### Final Answer:
Columella auris is a modified **hyomandibular**.

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