Primary cell wall formed by :-

Options

A. Intussusception
B. Apposition
C. Intussusception & lignification
D. Mineralization

Answer

To answer the question "Primary cell wall formed by:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Plant Cells**:
- Plant cells are surrounded by a cell wall, which is primarily composed of cellulose. The cell wall is a rigid structure that provides support and protection to the cell.

2. **Identify the Types of Cell Wall Growth**:
- The primary cell wall is formed during the growth of the plant. There are two main processes involved in the growth of the cell wall:
- **Endosuspension**: This is the process where new materials are deposited between the existing components of the wall.
- **Apposition**: This involves the addition of new layers of wall material on the outside of the existing wall.

3. **Evaluate the Given Options**:
- The question provides multiple options regarding how the primary cell wall is formed. We need to analyze these options:
- **Endosuspension**: This is the correct answer as it describes the deposition of new materials between existing wall components.
- **Apposition**: This option is incorrect as it refers to the growth occurring in new cells rather than the formation of the primary wall.
- **Interspension**: This term is not relevant in the context of primary cell wall formation.
- **Lignification**: This refers to the process of adding lignin to the cell wall, which is not part of the primary cell wall formation.
- **Mineralization**: This involves the deposition of minerals and is not related to the primary cell wall.

4. **Conclude with the Correct Answer**:
- Based on the analysis, the primary cell wall is formed by **Endosuspension**.

### Final Answer:
The primary cell wall is formed by **Endosuspension**.