Stele includes

Options

A. 1)Endodermis, pericycle, xylem, phloem, cambium, pith and pith rays
B. 2)Pericycle, xylem, phloem, cambium, pith and pith rays
C. 3)Xylem, phloem, cambium, pith and pith rays only
D. 4)Xylem, phloem and cambium only

Answer

**Step-by-Step Solution:**

1. **Understanding the term 'Stele':**
- Stele refers to the central part of the root or stem in vascular plants. It is composed of various tissues that are essential for the plant's structure and function.

2. **Components of Stele:**
- The stele includes several key components:
- **Pericycle:** A layer of cells that can give rise to lateral roots.
- **Xylem:** The tissue responsible for water and nutrient transport from roots to other parts of the plant.
- **Phloem:** The tissue responsible for the transport of sugars and other metabolic products downward from the leaves.
- **Cambium:** A layer of tissue that produces new xylem and phloem cells, allowing for growth in thickness.
- **Cambium rays:** These are extensions of the cambium that help in the lateral transport of nutrients and water.

3. **Identifying Incorrect Options:**
- The question provides four options, and we need to determine which one accurately lists the components of the stele.
- **Option 1:** Endodermis, pericycle, xylem, phloem, cambium with rays - **Incorrect** because endodermis is not part of the stele; it is part of the cortex.
- **Option 2:** Pericycle, xylem, phloem, cambium with rays - **Correct** as it includes all the essential components of the stele.
- **Option 3:** Xylem, phloem, cambium with rays only - **Incorrect** as it omits the pericycle.
- **Option 4:** Xylem, phloem, cambium only - **Incorrect** as it also omits the pericycle and does not mention the rays.

4. **Conclusion:**
- After evaluating all options, the correct answer is **Option 2: Pericycle, xylem, phloem, cambium with rays**.

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