Which of the following evolved into the first amphibians?

Options

A. Lobefins
B. Shrews
C. Salamanders
D. Turtles

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which organisms evolved into the first amphibians. To answer this, we need to identify the ancestors of amphibians.

2. **Identifying Early Land Inhabitants**: It is important to note that the first organisms that invaded land were primarily plants. However, animals also started to adapt to terrestrial life.

3. **Focus on Fish**: Among the animals, certain fish began to adapt to life on land. Specifically, fish with stout and strong fins were capable of moving onto land and returning to water.

4. **Timeframe of Evolution**: This transition from water to land occurred approximately 350 million years ago.

5. **Key Fish Group**: The fish that played a crucial role in this transition are known as lobe-finned fish. These fish are characterized by their fleshy, lobed fins which allowed them to support their weight on land.

6. **Example of Lobe-Finned Fish**: A notable example is the coelacanth, which was thought to be extinct until it was rediscovered in 1938 off the coast of South Africa. This fish is a representative of lobe-finned fish.

7. **Conclusion**: Based on the evidence, it is clear that amphibians evolved from lobe-finned fish. Thus, the correct answer to the question is lobe fins.

**Final Answer**: Lobe fins evolved into the first amphibians.

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