Jawless fish probably evolved around 500 mya. True/False

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The question states that jawless fish probably evolved around 500 million years ago. We need to determine if this statement is true or false.

2. **Researching the Evolution Timeline**: To evaluate the statement, we should look into the timeline of the evolution of jawless fish.

3. **Identifying Key Facts**:
- The first cellular forms of life appeared around 2000 million years ago.
- Before 500 million years ago, the only forms of life present were invertebrates.
- Jawless fish are considered the first vertebrates.

4. **Determining the Correct Timeframe**:
- Jawless fish are believed to have evolved around 350 million years ago, not 500 million years ago.

5. **Conclusion**: Since jawless fish evolved around 350 million years ago, the statement that they evolved around 500 million years ago is incorrect. Therefore, the statement is **false**.

**Final Answer**: False.

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