The first amphibians that lived an both land and water

Options

A. Jawless fish
B. Coelacanth
C. Lobefins
D. Fringe-finned fish

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the first amphibians that lived both on land and in water. This indicates we are looking for a transitional species that exhibits characteristics of both aquatic and terrestrial life.

2. **Identifying the Options**: The options provided include various types of fish and amphibians. We need to analyze each option to determine which one fits the criteria of being the first amphibian.

3. **Evaluating Jawless Fish (Agnatha)**: The first option is jawless fish, known as Agnatha. These creatures are primitive and link non-chordates to chordates but are not classified as amphibians. Therefore, they cannot be considered the first amphibians.

4. **Evaluating Coelacanth**: The second option is Coelacanth, a type of fish that shares some similarities with amphibians. However, Coelacanths are primarily aquatic and do not have adaptations for living on land. Thus, they are not the first amphibians.

5. **Evaluating Lobe-finned Fish**: The third option is lobe-finned fish, which are known for their limb-like appendages. These appendages allow them to navigate both in water and on land, making them a crucial link in the evolution of amphibians. Therefore, they are classified as the first amphibians.

6. **Evaluating Fringe-finned Fish**: The final option is fringe-finned fish, which have a single bone structure but do not exhibit amphibious characteristics. Thus, they cannot be considered as the first amphibians.

7. **Conclusion**: Based on the evaluations, the correct answer is the lobe-finned fish, as they represent the first amphibians capable of living both in water and on land.

**Final Answer**: The first amphibians that lived on both land and water are the lobe-finned fish.

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