Root apex has a zone of slow dividing cells in the middle of rapidly dividing cells. It is

Options

A. quiescent cenre
B. sluggish centre
C. dormant centre
D. non-meristematic zone

Answer

To answer the question about the zone of slow dividing cells located in the root apex, we can break down the explanation step by step:

### Step-by-Step Solution:

1. **Understanding Root Apex Structure**: The root apex is the tip of the root where growth occurs. It consists of various zones, including zones of cell division.

2. **Identifying Cell Division Zones**: In the root apex, there are zones where cells are actively dividing (rapidly dividing cells) and zones where cell division is slower.

3. **Defining the Zone of Slow Dividing Cells**: The zone of slow dividing cells is known as the "Quiescent Center" (QC). This area is characterized by a small group of cells that exhibit low mitotic activity, meaning they divide infrequently.

4. **Location of the Quiescent Center**: The quiescent center is located at the tips of growing roots and is surrounded by initial cells that are actively dividing.

5. **Function of the Quiescent Center**: The QC plays a crucial role in maintaining the initial cells in a state that allows them to continue dividing and producing various tissues of the root, such as vascular tissues, cortex, and pericycle.

6. **Conclusion**: Therefore, the zone of slow dividing cells in the middle of rapidly dividing cells at the root apex is referred to as the Quiescent Center (QC).

### Final Answer:
The zone of slow dividing cells in the root apex is called the Quiescent Center (QC).

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