Aves originated during

Options

A. Devonian period
B. Jurassic period
C. Carboniferous period
D. Silurian period

Answer

To determine when Aves (birds) originated, we need to analyze the given options and the corresponding periods in which significant evolutionary events occurred.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options regarding the period of origin for Aves:
- Devonian period
- Jurassic period
- Carboniferous period
- Silurian period

2. **Understand the Periods**:
- **Devonian Period**: Known for the evolution of fishes, particularly the first tetrapods (amphibians).
- **Carboniferous Period**: This period is characterized by the evolution of amphibians from fish.
- **Silurian Period**: Notable for the diversification of jawed and bony fishes.
- **Jurassic Period**: This is the period when birds (Aves) are believed to have originated, evolving from theropod dinosaurs.

3. **Focus on Aves**: Aves are known to have evolved from theropod dinosaurs during the Jurassic period, which spanned approximately 165 to 150 million years ago.

4. **Eliminate Incorrect Options**:
- The Devonian, Carboniferous, and Silurian periods are associated with the evolution of other groups (fishes and amphibians) and not birds. Therefore, these options can be eliminated.

5. **Conclusion**: The correct answer is the **Jurassic period**, as this is when Aves originated.

### Final Answer:
Aves originated during the **Jurassic period**.

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