Medulla is not organized in

Options

A. Dicot stem
B. Monocot root
C. Dicot root
D. Monocot stem

Answer

To answer the question "Medulla is not organized in," let's analyze the options provided and understand the concept of medulla (or pith) in different plant structures.

### Step-by-Step Solution:

1. **Understand the term 'medulla':**
- Medulla, also known as pith, refers to the central part of the stem or root in vascular plants. It is primarily composed of parenchyma cells and is involved in storage and transport of nutrients.

2. **Identify the types of plants mentioned:**
- The options given are:
- Dicot stem
- Monocot root
- Dicot root
- Monocot stem

3. **Analyze the structure of the medulla in each option:**
- **Dicot Stem:** In dicot stems, the medulla is usually well-developed and organized, surrounded by vascular bundles.
- **Monocot Root:** Monocot roots typically have a well-defined pith, which can be organized.
- **Dicot Root:** Dicot roots usually have a small and less organized medulla compared to stems, but it is still present.
- **Monocot Stem:** Monocot stems also have a well-developed and organized medulla.

4. **Determine which option has a non-organized medulla:**
- Among the options, the **dicot root** is known to have a very small and less organized medulla compared to the other structures.

5. **Conclusion:**
- Therefore, the correct answer to the question "Medulla is not organized in" is **dicot root**.

### Final Answer:
Medulla is not organized in **dicot root**.