Pericycle in roots is never thick and sclerenchymatous because

Options

A. it does not act as mechanical tissue in roots
B. it gives rise to root hairs
C. it is a place of origin of lateral roots
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Pericycle**: The pericycle is a layer of cells located in the roots of plants, situated between the endodermis and the vascular tissue (xylem and phloem). It is primarily composed of parenchymatous cells.

2. **Composition of Pericycle**: The pericycle is made up of parenchyma, which are living cells that are generally thin-walled and involved in storage and transport functions. This composition is crucial for its role in the plant.

3. **Function of Pericycle**: The main functions of the pericycle include:
- Providing support to the vascular bundles.
- Protecting the vascular tissues (xylem and phloem).
- Serving as a site for the origin of lateral roots.

4. **Why Not Sclerenchymatous**: Sclerenchyma cells are thick-walled and provide mechanical strength to plants. The pericycle does not need to perform this function because:
- It is not primarily involved in mechanical support.
- Its role is more about protection and support of vascular tissues rather than providing structural integrity.

5. **Conclusion**: Therefore, the pericycle in roots is never thick and sclerenchymatous because it is composed of parenchymatous cells that do not serve the function of providing mechanical strength. Instead, it serves protective and supportive roles for the vascular bundles.