Simplest type of stele is

Options

A. with Pith, siphonostele
B. without pith, protostele
C. without pith, siphonostele
D. with Pith, protostele

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Stele:**
- A stele is the central part of the root or stem containing the vascular tissue (xylem and phloem).
- There are different types of steles based on the arrangement of vascular tissues.

2. **Identifying the Types of Stele:**
- The three main types of stele are:
- Protostele
- Siphonostele
- Compound stele

3. **Defining Protostele:**
- Protostele is the simplest type of stele.
- It is characterized by the absence of pith (the central tissue).
- The vascular tissues (xylem and phloem) are arranged in a cylindrical shape.

4. **Comparing with Other Types of Stele:**
- Siphonostele has a well-defined pith in the center, making it more complex than protostele.
- Compound stele has well-developed vascular bundles, indicating a more complex structure as well.

5. **Conclusion:**
- Since protostele is the simplest type of stele and is defined by the absence of pith, the correct answer to the question is "Protostele."

**Final Answer:**
The simplest type of stele is Protostele.

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