Origin of leathered bipeds occurred during

Options

A. Cretaceous period
B. Triassic period
C. Carboniferous period
D. Jurassic period Evolution

Answer

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Feathered bipeds**: These are animals that have feathers and walk on two legs. This term primarily refers to birds.
- **Bipeds**: Animals that walk on two legs.
- **Feathers**: A characteristic feature of birds.

2. **Identifying the Characteristics of Birds**:
- Birds are warm-blooded vertebrates.
- They lay eggs.
- They possess feathers.

3. **Understanding Vertebrates**:
- Vertebrates are animals that have a backbone or spinal column (notochord).
- This group includes birds, mammals, reptiles, amphibians, and fish.

4. **Identifying the Geological Periods**:
- **Cretaceous Period**: Known for the appearance of dinosaurs and flowering plants.
- **Triassic Period**: Known for the emergence of early reptiles, including lizards.
- **Carboniferous Period**: Characterized by the development of extensive forests and the first appearance of amphibians.
- **Jurassic Period**: This period is significant for the evolution of many species, including the first birds.

5. **Conclusion**:
- The origin of feathered bipeds (birds) occurred during the **Jurassic Period**. The first known bird is **Archaeopteryx**, which emerged during this time.

### Final Answer:
The origin of feathered bipeds occurred during the **Jurassic Period**.

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