Reptiles of different shapes and sizes dominated Earth. Which reptile went back into water to evolve into fish like reptiles 200 mya ?

Options

A. Ichthyosaurs
B. Tyrannosaurus
C. Hemidactylus
D. Pelycosaurs

Answer

To solve the question about which reptile went back into water to evolve into fish-like reptiles 200 million years ago, we can follow these steps:

### Step 1: Understand the Question
The question asks for a specific reptile that returned to aquatic life and evolved into fish-like reptiles around 200 million years ago.

### Step 2: Identify the Options
The options provided in the question include various reptiles. We need to analyze which of these reptiles is known for returning to the water and evolving into a fish-like form.

### Step 3: Analyze the Reptiles
Among the reptiles, one of the notable groups is the Ichthyosaurs. The name "Ichthyosaur" itself contains the root "ichthy-" which means fish-like. This suggests a strong connection to aquatic life.

### Step 4: Confirm the Evolutionary History
Ichthyosaurs are known to have evolved from land-dwelling reptiles that adapted back to life in the water. They appeared around 200 million years ago and are recognized as fish-like reptiles. This confirms that they fit the criteria set by the question.

### Step 5: Eliminate Other Options
Other reptiles mentioned in the options do not have a documented history of evolving back into a fish-like form. Therefore, they can be ruled out.

### Step 6: Conclusion
Based on the analysis, the correct answer to the question is **Ichthyosaurs**.

### Final Answer
The reptile that went back into water to evolve into fish-like reptiles 200 million years ago is **Ichthyosaurs**.

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