Root apex is subterminal because of the presence of

Options

A. root h aris
B. root cap
C. quiescent centre
D. all of these

Answer

To answer the question "Root apex is subterminal because of the presence of", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Term "Subterminal":**
- The term "subterminal" refers to a position that is just below the terminal point or tip of a structure. In the context of roots, it indicates that the apex (tip) of the root is not at the very end but slightly below it.

2. **Identifying the Structures at the Root Apex:**
- At the root apex, there are several structures that play important roles in root growth and protection. The most notable among these is the root cap.

3. **Role of the Root Cap:**
- The root cap is a protective structure that covers the tip of the root. It is made of parenchyma cells and serves to protect the delicate meristematic tissue underneath as the root pushes through the soil.

4. **Effect of the Root Cap on the Apex:**
- The presence of the root cap means that the actual growing point (the apical meristem) is located just beneath this cap. This positioning is what makes the root apex subterminal.

5. **Considering Other Options:**
- While other options like "Root Acheris" and "Quiescent Center" may relate to root structure, they do not directly explain why the root apex is subterminal. The root cap is the primary structure responsible for this characteristic.

6. **Conclusion:**
- Therefore, the correct answer to the question is that the root apex is subterminal because of the presence of the root cap.

### Final Answer:
- The correct answer is **Option B: Root Cap**.

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