How many types of cells are present in vascular cambium of dicot stem

Options

A. Two types , fusiform & ray initial
B. Only fusiform initial
C. Only ray initial
D. Three types fusiform, ray and medullary rays.

Answer

To answer the question regarding the types of cells present in the vascular cambium of a dicot stem, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Vascular Cambium**:
- The vascular cambium is a type of lateral meristem found in dicotyledonous plants. It is responsible for the secondary growth of stems and roots.

2. **Identifying Cell Types**:
- The vascular cambium consists of two main types of cells:
- **Fusiform Initials**: These are long, spindle-shaped cells that are involved in producing the vertical system of secondary xylem (wood) and secondary phloem (bark).
- **Ray Initials**: These are smaller, cuboidal cells that produce vascular rays, which form the horizontal system of secondary tissues.

3. **Function of Each Cell Type**:
- **Fusiform Cells**: They give rise to the vertical system of secondary phloem and xylem, which are essential for the transport of nutrients and water.
- **Ray Parenchyma Cells**: These cells contribute to the horizontal system, aiding in the storage and translocation of food and water.

4. **Conclusion**:
- Therefore, the vascular cambium of dicot stems contains **two types of cells**: fusiform initials and ray initials.

### Final Answer:
The vascular cambium of dicot stems has **two types of cells**: fusiform initials and ray initials.

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