vascular cambium produces

Options

A. Sexondary xylem and secondary phloem
B. Secondary xylem only
C. Secondary ploem only
D. Primary xylem and primary phloem

Answer

**Step-by-Step Solution:**

1. **Understanding Vascular Cambium:**
- Vascular cambium is a type of lateral meristem found in plants that is responsible for secondary growth. It is located between the xylem (wood) and phloem (bark).

2. **Types of Initials in Vascular Cambium:**
- There are two types of initials present in the vascular cambium:
- **Fusiform initials:** These are elongated cells that contribute to the formation of secondary xylem and phloem.
- **Ray initials:** These are shorter cells that contribute to the formation of ray parenchyma and secondary medullary rays.

3. **Products of Vascular Cambium:**
- The vascular cambium produces:
- **Secondary Xylem:** Formed from fusiform initials, which contribute to the vertical and axial system of the plant.
- **Secondary Phloem:** Also formed from fusiform initials, contributing to the horizontal and radial system.

4. **Conclusion:**
- Based on the functions of the vascular cambium, it is clear that it produces both secondary xylem and secondary phloem.

5. **Correct Answer:**
- Therefore, the correct option is: **Secondary xylem and secondary phloem.**