Growth of vascular cambiun is an example of :

Options

A. Senescence
B. Geometric growth
C. Arithmetic growth
D. Plasticity

Answer

To solve the question "Growth of vascular cambium is an example of:", we need to analyze the options provided and understand the nature of vascular cambium growth.

### 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, which increases the thickness of stems and roots.

2. **Identifying Growth Types**:
- We need to evaluate the types of growth mentioned in the options:
- **Senescence**: This refers to the process of aging in plants, characterized by a stable growth arrest. This does not apply to vascular cambium growth.
- **Geometric Growth**: This type of growth occurs when the quantity increases at a constant ratio over time, typically seen in populations. This does not describe the growth of vascular cambium.
- **Arithmetic Growth**: This is characterized by a constant addition of a certain amount over time. In the case of vascular cambium, it adds layers of cells (secondary xylem and phloem) in a regular manner, which aligns with arithmetic growth.
- **Plasticity**: This refers to the ability of a material to undergo permanent deformation. This does not relate to the growth of vascular cambium.

3. **Selecting the Correct Option**:
- Based on the analysis, the growth of vascular cambium is best described as **Arithmetic Growth** because it involves the regular addition of new cells over time.

### Final Answer:
The growth of vascular cambium is an example of **Arithmetic Growth** (Option 3).