Which of the following is not related to vascular cambium

Options

A. It consists of ray and fusiform initials
B. Most of it's divisions are periclinal
C. Every year only one is formed in concentric
D. Shows seasonal variations in activity

Answer

To determine which of the given options is not related to vascular cambium, we can analyze each statement based on our understanding of vascular cambium and its characteristics.

### Step-by-Step Solution:

1. **Understanding Vascular Cambium**:
- Vascular cambium is a type of lateral meristem in plants that contributes to secondary growth, increasing the girth of stems and roots.
- It consists of two types of cells: fusiform initials and ray initials.

2. **Analyzing the Options**:
- **Option 1: Rays and fusiform initials**:
- These are indeed related to vascular cambium. Ray initials give rise to medullary rays, and fusiform initials contribute to the formation of secondary xylem and phloem.
- **Option 2: Most of its division are periclinal**:
- This statement is also true. The division of vascular cambium cells primarily occurs in a periclinal manner, leading to the formation of secondary tissues.
- **Option 3: Every year only one is formed in concentric**:
- This statement is incorrect. Vascular cambium can form multiple rings (annual rings) in a year, depending on environmental conditions and seasonal variations. Therefore, this is not related to vascular cambium.
- **Option 4: Show seasonal variation in activity**:
- This statement is true. The activity of vascular cambium is influenced by seasonal changes, affecting its growth and division.

3. **Conclusion**:
- The statement that is not related to vascular cambium is **Option 3: Every year only one is formed in concentric**. This is incorrect because multiple rings can be formed in a year.

### Final Answer:
**Option 3: Every year only one is formed in concentric.**

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