Which of the following is not a feature of simple tissue?

Options

A. These are homogeneous in nature and are composed of structurally and functionally similar cells.
B. The wall thickening in collenchyma is primary in nature and is composed of cellulose, hemicellulose and lignin materials with a high percentage of water
C. Parenchyma is the most common tissue which is morphologically and physiologically unspecialised,
D. The simple permanent tissues are parenchyma, collenchyma and sclerenchyma.

Explanation

To determine which of the following is not a feature of simple tissue, we need to analyze the characteristics of simple tissues in plants. Simple tissues are classified as permanent tissues that consist of only one type of cell. Let's break down the features of simple tissues step by step:

### Step-by-Step Solution:

1. **Definition of Simple Tissue**:
- Simple tissues are composed of only one type of cell. They are homogeneous in nature, meaning all the cells within the tissue share similar structures and functions.

2. **Types of Simple Tissues**:
- The main types of simple tissues include:
- **Parenchyma**: These cells are unspecialized and can perform various functions such as storage, photosynthesis, and tissue repair.
- **Collenchyma**: These cells provide support and flexibility to the plant, characterized by thickened cell walls, especially at the corners.
- **Sclerenchyma**: These cells are thick-walled and provide rigidity and strength to the plant.

3. **Characteristics of Simple Tissues**:
- Homogeneous in nature.
- Composed of structurally and functionally similar cells.
- Each type of simple tissue has specific characteristics (e.g., collenchyma has thickened corners).

4. **Analyzing the Options**:
- If one of the options states something that contradicts the characteristics of simple tissues, that option would be the correct answer to the question of which is not a feature of simple tissue.

5. **Identifying the Incorrect Statement**:
- The statement regarding collenchyma mentions that its cell walls are thick due to the deposition of cellulose, hemicellulose, and lignin. However, while cellulose and hemicellulose are present, lignin is typically absent in collenchyma. Therefore, this statement is incorrect regarding the features of simple tissue.

### Conclusion:
The statement about the wall thickening of collenchyma being due to lignin is not a feature of simple tissue. Hence, this is the correct answer to the question.