Vestigeal pelvic girdle and bones of hind limbs are the characteristic of

Options

A. Whale
B. Dolphin
C. Shark
D. Seal

Answer

To answer the question regarding the vestigial pelvic girdle and bones of hind limbs, we will analyze the characteristics of the given options step by step.

### Step-by-Step Solution:

1. **Understanding Vestigial Organs**:
- Vestigial organs are those that have lost their original function through the course of evolution. They are remnants of structures that were functional in ancestral species.

2. **Identifying the Options**:
- The options provided are:
1. Whale
2. Dolphin
3. Shark
4. Seal

3. **Analyzing Each Option**:
- **Whale**: Whales are fully aquatic mammals. During their evolution, their hind limbs have become vestigial as they adapted to life in water. The pelvic girdle is present but not fully developed, making it a vestigial structure.
- **Dolphin**: Dolphins are also aquatic mammals, but they retain functional structures related to their hind limbs and pelvic girdle, so they do not have vestigial hind limbs.
- **Shark**: Sharks are cartilaginous fish and do not possess bones, including a pelvic girdle or hind limbs. Therefore, they cannot have vestigial structures in this context.
- **Seal**: Seals are pinnipeds and have functional hind limbs and pelvic girdles that are not vestigial.

4. **Conclusion**:
- Based on the analysis, the only option that fits the description of having vestigial pelvic girdle and bones of hind limbs is the **Whale**. Thus, the correct answer is **Option 1: Whale**.