Promeristems can be differentiated to form primary meristem by?

Options

A. Apical positon
B. Active cell division
C. Vascuoles
D. Large nuclei.

Answer

To answer the question "Promeristems can be differentiated to form primary meristem by?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pro-meristems**:
- Pro-meristems are the initial meristematic tissues that are present in the plant. They are undifferentiated cells that have the potential to develop into various types of meristems.

2. **Definition of Primary Meristem**:
- Primary meristems are derived from pro-meristems and are responsible for the primary growth of the plant, which includes elongation of roots and shoots.

3. **Location of Differentiation**:
- The differentiation of pro-meristems into primary meristems occurs at specific locations in the plant. This is primarily at the **apical position**, which is the tip of the shoot or root.

4. **Apical Meristem**:
- The apical meristem is located at the apex of the plant (the growing tip). It gives rise to primary meristems, which will eventually develop into various tissues such as protoderm (epidermis), ground meristem (cortex and pith), and procambium (vascular tissues).

5. **Lateral Meristem**:
- In contrast, lateral meristems (such as cambium) are located below the apical meristem and are responsible for secondary growth, which increases the thickness of the plant.

6. **Conclusion**:
- Therefore, pro-meristems can be differentiated to form primary meristem by their location at the **apical position** of the plant.

### Final Answer:
Promeristems can be differentiated to form primary meristem by their location at the apical position.

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