Each half of lower jaw of a mammal is made of

Options

A. stapes
B. patella
C. incus
D. dentary

Answer

To solve the question "Each half of lower jaw of a mammal is made of," we can follow these steps:

1. **Identify the Options**: The options provided are sepis, patella, incus, and dentary.

2. **Understand the Anatomy**: We need to recall the anatomy of the mammalian jaw. The lower jaw, also known as the mandible, consists of two halves.

3. **Evaluate Each Option**:
- **Sepis**: This is not related to the jaw; it is a term that refers to a type of cephalopod.
- **Patella**: This is known as the kneecap and is found in the knee joint, not in the jaw.
- **Incus**: This is one of the bones in the middle ear, also not related to the jaw.
- **Dentary**: This is the bone that makes up the lower jaw in mammals. It is the only bone present in the lower jaw and is responsible for bearing teeth.

4. **Select the Correct Answer**: Based on the evaluation, the correct answer is **dentary**.

5. **Conclusion**: Each half of the lower jaw of a mammal is made of the dentary bone.