The last major evolutionary advancement among the vascular plants was the emergence of flowering plants (Angiosperms) about

Options

A. 350 million years ago
B. 140 million years ago
C. 16,00 million years ago
D. 220 million years ago

Answer

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

1. **Understanding the Question**: The question asks about the time period when flowering plants (Angiosperms) emerged as the last major evolutionary advancement among vascular plants.

2. **Identifying the Options**: The options provided are 350 million years ago, 140 million years ago, 1600 million years ago, and 220 million years ago.

3. **Contextualizing Angiosperms**: Angiosperms are known as flowering plants and are classified under Phanerogams, which also include gymnosperms. Both groups evolved alongside each other.

4. **Determining the Era**: The emergence of angiosperms occurred at the end of the Mesozoic era, which is also known as the age of reptiles. This era ended approximately 100 to 140 million years ago.

5. **Identifying the Specific Period**: The last period of the Mesozoic era is known as the Cretaceous period, during which angiosperms first appeared. This is estimated to be around 140 million years ago.

6. **Eliminating Incorrect Options**:
- 350 million years ago corresponds to the beginning of the Proterozoic era, which is too early for angiosperms.
- 1600 million years ago is before the evolution of vascular plants.
- 220 million years ago is also too early, as it is before the emergence of angiosperms.

7. **Conclusion**: Based on the information, the correct answer is that angiosperms emerged around 140 million years ago.

**Final Answer**: The last major evolutionary advancement among vascular plants was the emergence of flowering plants (Angiosperms) about **140 million years ago**.

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