Mention the reptilian and avian characters of Archaeopteryx

Explanation

### Step-by-Step Solution

1. **Understanding Archaeopteryx**: Archaeopteryx is a significant fossil that showcases characteristics of both reptiles and birds, making it a crucial link in the study of evolution.

2. **Reptilian Characters**:
- **Claws on Fingers**: One of the primary reptilian traits of Archaeopteryx is the presence of claws on its fingers. This feature is typical in reptiles, which often have claws for climbing or grasping.
- **Long Tail**: Archaeopteryx possesses a long tail, which is a characteristic feature of reptiles. In modern birds, the tail is much shorter and modified.
- **Sternum Structure**: The sternum (breastbone) of Archaeopteryx is similar to that of reptiles, lacking the keel structure found in modern birds that supports flight muscles.
...