Which of following is found as sub epidermal tissue in young stem, leaf petioles of dicots

Options

A. Parenchyma
B. Cambium
C. Collenchyma
D. Conjunctive tissue

Answer

To solve the question regarding which tissue is found as sub-epidermal tissue in the young stem and leaf petioles of dicots, we can follow these steps:

### Step 1: Understand the question
The question asks for the type of tissue located just beneath the epidermis in young stems and leaf petioles of dicot plants.

### Step 2: Review the options
The options provided are:
1. Parenchyma
2. Cambium
3. Collenchyma
4. Conjunctive tissue

### Step 3: Analyze each option
- **Parenchyma**: This is a type of fundamental tissue that is usually found in various parts of the plant but is not specifically known for being sub-epidermal in young stems and leaf petioles.

- **Cambium**: This is a type of meristematic tissue responsible for secondary growth in plants. It is located between the xylem and phloem and is not found directly beneath the epidermis in young stems or leaf petioles.

- **Collenchyma**: This is a type of supportive tissue that is typically found just beneath the epidermis in young stems and leaf petioles of dicots. The cells of collenchyma are characterized by their thickened corners due to the deposition of cellulose, hemicellulose, and pectin, providing mechanical support.

- **Conjunctive tissue**: This term is not commonly used to describe a specific tissue type in the context of sub-epidermal layers in dicots.

### Step 4: Identify the correct answer
Based on the analysis, **Collenchyma** is the correct answer as it is specifically found as sub-epidermal tissue in young stems and leaf petioles of dicots.

### Final Answer
The correct answer is **Collenchyma**.

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