Sclerenchyma is mechanical tissue because it has

Options

A. Secondary wall
B. Thick lignified cell wall
C. Pits
D. has bordered pits

Answer

### Step-by-Step Solution

**Step 1: Understand the Definition of Sclerenchyma**
- Sclerenchyma is a type of plant tissue that provides mechanical support and strength to the plant.

**Step 2: Identify the Characteristics of Sclerenchyma**
- Sclerenchyma cells are typically dead at maturity, which distinguishes them from other supportive tissues like collenchyma, which are living cells.

**Step 3: Recognize the Role of Cell Walls**
- The mechanical strength of sclerenchyma is primarily due to its cell walls. These walls are thick and lignified.

**Step 4: Explain Lignification**
- Lignification refers to the process where lignin, a complex organic polymer, is deposited in the cell walls, making them rigid and strong.

**Step 5: Conclude Why Sclerenchyma is a Mechanical Tissue**
- Because sclerenchyma cells have thick, lignified cell walls, they provide structural support and protection to the plant, which is why they are classified as a mechanical tissue.

### Final Answer
Sclerenchyma is considered a mechanical tissue because it has thick lignified cell walls that provide strength and support to the plant.

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