Avian pelvic girdle is

Options

A. Broad
B. Short
C. Elongated
D. Vertical

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the characteristics of the avian pelvic girdle. We need to identify its shape or structural features from the given options: broad, short, elongated, or vertical.

2. **Identifying the Function of the Pelvic Girdle:**
The pelvic girdle is a bony structure that connects the hind limbs to the vertebral column. This is a common feature in all vertebrates, including birds (avians).

3. **Analyzing the Structure of the Avian Pelvic Girdle:**
In birds, the pelvic girdle is unique compared to mammals. It is elongated and is positioned almost parallel to the ground. This elongation is significant for their locomotion and reproductive functions.

4. **Comparing with Other Vertebrates:**
While humans and other mammals also have a pelvic girdle made up of three bones (ileum, ischium, and pubis), the avian pelvic girdle is specifically elongated, which differentiates it from the broader or shorter pelvic girdles found in mammals.

5. **Identifying the Correct Option:**
Given the options:
- Broad: Incorrect
- Short: Incorrect
- Elongated: Correct
- Vertical: Incorrect

The correct answer is that the avian pelvic girdle is **elongated**.

**Final Answer:**
The avian pelvic girdle is **elongated**.

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