Which of the following statements is correct about the evolution of dinosaurs ?

Options

A. Triceratops evolved from Tyrannosaurus
B. Brachiosaurus evolved from stegosaurus
C. Stegosaurus evolved from Triceratops
D. Tyrannosaurus evolved from Brachiosaurus

Answer

To solve the question regarding the evolution of dinosaurs, we will analyze each option provided and determine which statement is correct.

### Step-by-Step Solution:

1. **Understanding Dinosaur Evolution**:
- Dinosaurs evolved over millions of years, and their evolutionary relationships can be complex. We need to identify the correct lineage among the options given.

2. **Analyzing Option A**:
- **Statement**: "Triceratops evolved from Tyrannosaurus."
- **Evaluation**: This statement is incorrect because Triceratops and Tyrannosaurus are from different branches of the dinosaur family tree. Triceratops is a ceratopsian dinosaur, while Tyrannosaurus is a theropod. Therefore, Triceratops did not evolve from Tyrannosaurus.

3. **Analyzing Option B**:
- **Statement**: "Brachiosaurus evolved from Stegosaurus."
- **Evaluation**: This statement is also incorrect. Brachiosaurus and Stegosaurus belong to different groups of dinosaurs. Brachiosaurus is a sauropod, while Stegosaurus is a stegosaur. They did not evolve from one another.

4. **Analyzing Option C**:
- **Statement**: "Stegosaurus evolved from Triceratops."
- **Evaluation**: This statement is incorrect as well. Stegosaurus and Triceratops are both distinct groups of dinosaurs and did not evolve from one another.

5. **Analyzing Option D**:
- **Statement**: "Tyrannosaurus evolved from Brachiosaurus."
- **Evaluation**: This statement is correct. Tyrannosaurus and Brachiosaurus share a common ancestor, and Tyrannosaurus is considered to have evolved from earlier theropods that are related to the lineage of Brachiosaurus.

6. **Conclusion**:
- After evaluating all the options, we find that the correct statement is **Option D**: "Tyrannosaurus evolved from Brachiosaurus."

### Final Answer:
- The correct statement about the evolution of dinosaurs is **Option D**: "Tyrannosaurus evolved from Brachiosaurus."

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