Meriststematic activity occurs at

Options

A. bud
B. stem apex
C. leaf
D. root hair

Answer

### Step-by-Step Solution:

1. **Understanding Meristematic Activity**:
- Meristematic activity refers to the regions in plants where cells are actively dividing and contributing to growth. These regions are crucial for the development of new tissues and organs.

2. **Types of Meristems**:
- There are three main types of meristematic tissues:
- **Apical Meristem**: Located at the tips of roots and shoots, responsible for primary growth (lengthening of the plant).
- **Lateral Meristem**: Found along the sides of stems and roots, responsible for secondary growth (increasing thickness).
- **Intercalary Meristem**: Located at the nodes and internodes of stems, contributing to the growth of leaves and stems.

3. **Identifying Locations of Meristematic Activity**:
- The question asks where meristematic activity occurs. The options given are bud, stem apex, leaf, or root hair.
- The **stem apex** (tip of the stem) and **root apex** (tip of the root) are the primary locations for apical meristematic activity.

4. **Conclusion**:
- Since the question focuses on where meristematic activity occurs, the correct answers would be both the **stem apex** and **root apex**. However, if we are to choose one from the options provided, the **stem apex** is a clear choice as it is a common reference point for apical meristem activity.

### Final Answer:
Meristematic activity occurs at the **stem apex** (and also at the root apex).

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