Virgin cork is

Options

A. The first formed periderm
B. A lenticellate phellem
C. A nonlenticellate periderm
D. The last peridurm

Answer

**Step-by-Step Solution:**

1. **Understanding Virgin Cork**: Virgin cork refers to the cork that is produced by the cork oak tree (Quercus suber) before any harvesting occurs. It is the initial layer of cork that forms on the tree.

2. **Formation of Periderm**: The cork oak tree develops a protective layer known as periderm, which consists of cork cells. This periderm is crucial for protecting the tree from environmental factors.

3. **First Formed Periderm**: The virgin cork is specifically identified as the first formed periderm. It is the cork that is present before any cork extraction takes place.

4. **Appearance of Virgin Cork**: Virgin cork has a typical appearance that can be observed on young cork oak trees, particularly on branches that have not been stripped of their cork.

5. **Cork Extraction Timeline**: The cork oak tree typically starts producing commercially viable cork after about 25 years. The virgin cork is the layer that is harvested during the first extraction.

6. **Conclusion**: Based on the information, the correct answer to the question "Virgin cork is" is that it is the "first formed periderm."

**Final Answer**: Virgin cork is the first formed periderm.

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