Arrange the following in the order of their location from the periphery to center in the dicotyledons body
I. Endodermis
II. Metaxylem
III. Trichoblasts
IV. Phloem

Options

A. IV,I,II,III
B. IV,II,III,I
C. I,II,III,IV
D. III,I,IV,II

Answer

To solve the question of arranging the given structures in the order of their location from the periphery to the center in a dicotyledon body, we need to understand the anatomical structure of a dicotyledonous plant. Here’s a step-by-step breakdown:

### Step 1: Identify the Outermost Layer
- The first structure we need to identify is the outermost layer of the dicotyledon body. This is where the trichoblasts are located. Trichoblasts are specialized root hair cells found in the epidermis, which is the outermost layer of the plant.

**Hint:** Look for the structure that is part of the epidermis; it will be the first in the arrangement.

### Step 2: Locate the Next Layer
- After the trichoblasts, we move inward to the next layer, which is the endodermis. The endodermis is a layer of cells that surrounds the vascular tissue and is involved in regulating the flow of water and nutrients.

**Hint:** The endodermis is located just beneath the epidermis, so it follows the trichoblasts.

### Step 3: Identify the Vascular Tissues
- Next, we need to identify the vascular tissues. Between the phloem and metaxylem, we need to determine their relative positions. In dicotyledons, the phloem is usually located towards the outer side of the vascular bundle, while the metaxylem is found towards the center.

**Hint:** Remember that phloem transports nutrients, while xylem (including metaxylem) transports water; their arrangement is crucial.

### Step 4: Final Arrangement
- Based on the above information, we can arrange the structures from the periphery to the center:
1. **Trichoblasts** (outermost layer)
2. **Endodermis**
3. **Phloem**
4. **Metaxylem** (innermost part)

Thus, the final order from the periphery to the center is:
**Trichoblasts → Endodermis → Phloem → Metaxylem**

### Conclusion
The correct arrangement of the structures is:
**III (Trichoblasts) → I (Endodermis) → IV (Phloem) → II (Metaxylem)**

### Final Answer
The correct option is: **3, 1, 4, 2**

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