The ground tissue system consists of -

Options

A. Parenchyma
B. Collenchyma
C. Sclerenchyma
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Ground Tissue System**: The ground tissue system in plants is primarily composed of simple and permanent tissues. These tissues are essential for various functions within the plant.

2. **Definition of Simple Tissues**: Simple tissues consist of only one type of cell. This uniformity in cell type means that the functions of these tissues are also similar.

3. **Definition of Permanent Tissues**: Permanent tissues are made up of non-dividing cells. Unlike meristematic tissues, which are capable of continuous division, permanent tissues have completed their growth and differentiation.

4. **Types of Cells in Ground Tissue**: The ground tissue system includes three main types of cells:
- **Parenchyma Cells**: These cells are involved in storage, photosynthesis, and tissue repair. They are typically living cells with thin cell walls.
- **Collenchyma Cells**: These provide support and flexibility to the plant. They have thicker cell walls and are often found in young stems and leaves.
- **Sclerenchyma Cells**: These cells provide structural support due to their thick, lignified walls. They are usually dead at maturity.

5. **Functions of Ground Tissue**: The ground tissue system serves several functions:
- It fills the interior of the plant, providing a medium for metabolic processes.
- It offers mechanical support to the plant structure.
- It is involved in the storage of food and water.

6. **Conclusion**: Therefore, the ground tissue system consists of parenchyma, collenchyma, and sclerenchyma cells. The correct answer to the question is option number 4: all of the above.

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