Which dead tissue contributes the most to mechanical strength of plant?

Options

A. Sclerenchyma
B. Cork
C. Sclereids
D. Collenchyma

Answer

To answer the question, "Which dead tissue contributes the most to mechanical strength of plant?" we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Plant Tissues**:
- Plant tissues are classified into two main categories: meristematic and permanent tissues. Permanent tissues can be further divided into simple and complex tissues.

2. **Focus on Simple Permanent Tissues**:
- Simple permanent tissues include parenchyma, collenchyma, and sclerenchyma.

3. **Differentiate Between Living and Dead Tissues**:
- Among these, parenchyma and collenchyma are living tissues, while sclerenchyma is a dead tissue.

4. **Understand the Function of Sclerenchyma**:
- Sclerenchyma is known for its role in providing mechanical support and strength to the plant. It consists of thick-walled cells that are dead at maturity.

5. **Conclude on the Contribution to Mechanical Strength**:
- Since the question specifically asks for the dead tissue that contributes the most to mechanical strength, the answer is sclerenchyma.

6. **Final Answer**:
- The dead tissue that contributes the most to the mechanical strength of the plant is **sclerenchyma**.