Bordered pits are elongated transversely and arranged in vertical series. The pattern is known as

Options

A. Scalariform pitting
B. Intervascular pitting
C. Reticulate thickening
D. Oblique pitting

Answer

**Step-by-Step Solution:**

1. **Understanding Bordered Pits**: Bordered pits are specialized structures found in the xylem of plants. They are characterized by a pit membrane that is bordered by a thickened area, which allows for the movement of water and minerals between adjacent cells.

2. **Identifying the Arrangement**: The question specifies that these bordered pits are elongated transversely and arranged in vertical series. This means that the pits are not only elongated but also aligned in a vertical manner, creating a specific pattern.

3. **Analyzing the Options**: The options provided are:
- Option 1: Calendiform
- Option 2: Intravascular
- Option 3: Reticular thickening
- Option 4: Oblique thickening

4. **Relating to Plant Anatomy**: In plant anatomy, particularly in the xylem, certain types of pit arrangements are recognized. The term "sclereform" is associated with a specific type of pitting that appears ladder-like due to the arrangement of these bordered pits.

5. **Identifying the Correct Answer**: Among the options, the term that best describes the elongated, vertically arranged bordered pits is "sclereform pitting." This term is used to describe the ladder-like appearance created by the arrangement of these pits.

6. **Conclusion**: Therefore, the correct answer to the question is **sclereform pitting**.

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