Tooth birds became extinct in

Options

A. triassic
B. cretaceous
C. jurassic
D. Palaeocene

Answer

Tooth birds, also known as toothed birds, are a fascinating subject in the study of paleontology and the evolution of birds. Here’s a step-by-step solution to the question regarding when these birds became extinct:

### Step-by-Step Solution:

1. **Understanding Tooth Birds**:
- Tooth birds refer to a group of prehistoric birds that possessed teeth. Unlike modern birds, which have beaks without teeth, these ancient birds had a jaw structure that included teeth.

2. **Classification**:
- Tooth birds are classified within the class Aves, which is part of the subphylum Vertebrata. This classification is important to understand their evolutionary context.

3. **Evolutionary Context**:
- The existence of tooth birds is linked to the Mesozoic Era, a significant geological time frame that lasted from approximately 250 million years ago to about 65 million years ago.

4. **Cretaceous Period**:
- The Mesozoic Era is divided into three periods: Triassic, Jurassic, and Cretaceous. The Cretaceous period is the last of these periods and is known for the dominance of dinosaurs, including those with bird-like characteristics.

5. **Example of Tooth Birds**:
- A prominent example of a tooth bird is the Archaeopteryx, which lived during the Cretaceous period. This species is often cited as a transitional form between non-avian dinosaurs and modern birds.

6. **Extinction**:
- Tooth birds, along with many other species, became extinct at the end of the Cretaceous period, around 65 million years ago, likely due to a mass extinction event.

7. **Conclusion**:
- Therefore, the correct answer to the question "Tooth birds became extinct in" is the Cretaceous period.

### Final Answer:
Tooth birds became extinct in the Cretaceous period.

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