Select the incorrect statement w.r.t. meristem

Options

A. It is a group of immature cells
B. It is the area of active cell division in a plant
C. It is responsible for the formation of primary plant body
D. Lateral meristems occur in all plants

Answer

To solve the question regarding the incorrect statement about meristem, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Meristematic Cells**:
- Meristematic cells are undifferentiated cells in plants that have the ability to divide and give rise to various types of plant tissues.
- **Statement**: "Meristematic cells are a group of immature cells."
- **Evaluation**: This statement is **correct** because meristematic cells are indeed immature and can divide.

2. **Active Cell Division**:
- Meristematic tissues are known for their role in active cell division, which is crucial for plant growth.
- **Statement**: "It is the area of active cell division in the plant."
- **Evaluation**: This statement is also **correct** as meristems are the regions where cell division occurs actively.

3. **Formation of Primary Plant Body**:
- Meristems contribute to the formation of the primary plant body, which includes the roots and shoots.
- **Statement**: "It is responsible for the formation of the primary plant body."
- **Evaluation**: This statement is **correct** as primary meristems (apical meristems) are responsible for this formation.

4. **Lateral Meristem Occurrence**:
- Lateral meristems are responsible for secondary growth, which increases the girth of the plant.
- **Statement**: "Lateral meristem occurs in all plants."
- **Evaluation**: This statement is **incorrect** because not all plants have lateral meristems. For example, many monocots do not exhibit secondary growth and therefore lack lateral meristems.

### Conclusion:
The incorrect statement with respect to meristem is: **"Lateral meristem occurs in all plants."**