Reptilian feature of Archaeopteryx is

Options

A. U-shaped furcula
B. Beak
C. Abdominal ribs
D. Feathers

Answer

The question asks about the reptilian features of Archaeopteryx. To answer this, we need to understand what Archaeopteryx is and its significance in the study of evolution, particularly in the context of reptiles and birds.

### Step-by-Step Solution:

1. **Understanding Archaeopteryx**: Archaeopteryx is a genus of bird-like dinosaurs that lived during the Late Jurassic period. It is often considered a transitional fossil between non-avian dinosaurs and modern birds.

2. **Reptilian Features**: Archaeopteryx exhibits several features that are characteristic of reptiles. These include:
- **Teeth**: Unlike modern birds, Archaeopteryx had teeth in its beak, which is a feature of reptiles.
- **Clawed Wings**: It had wings with three separate claws, similar to those found in some reptiles.
- **Long Tail**: Archaeopteryx possessed a long, bony tail, unlike the short, fused tail of modern birds.
- **Skeletal Structure**: The skeletal structure of Archaeopteryx shows similarities to that of small theropod dinosaurs, which are reptiles.

3. **Significance of Reptilian Features**: The presence of these reptilian features in Archaeopteryx supports the theory of evolution by demonstrating how certain traits can persist in transitional forms. This helps in understanding the evolutionary link between reptiles and birds.

4. **Conclusion**: The reptilian features of Archaeopteryx highlight its role as a crucial link in the evolutionary chain, illustrating the transition from reptiles to birds.

### Final Answer:
The reptilian features of Archaeopteryx include teeth, claws on its wings, a long bony tail, and a skeletal structure similar to that of theropod dinosaurs.

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