All statements given are exclusive characters of meristematic cells, except

Options

A. Dense protoplasm and absence of vacuoles
B. Isodiametric shape with no intercellular spaces
C. Colourless proplastids and a bigger nucleus
D. Metabolically less active or inert with a thin cellulosic wall

Answer

To solve the question regarding the exclusive characteristics of meristematic cells, we need to analyze each statement provided in the options and identify the one that does not exclusively pertain to meristematic cells.

### 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 tissues. They are primarily responsible for growth in plants.

2. **Analyzing the First Statement**:
- **Statement**: "Dense protoplasm and absence of vacuoles."
- **Analysis**: Meristematic cells have dense protoplasm due to active metabolic processes and lack vacuoles because they do not store waste materials. This statement is correct.

3. **Analyzing the Second Statement**:
- **Statement**: "Meristematic cells are isodimetric in shape and do not have any intracellular spaces."
- **Analysis**: Meristematic cells are typically isodimetric (equal dimensions) and do not have large intracellular spaces, which allows for efficient division. This statement is also correct.

4. **Analyzing the Third Statement**:
- **Statement**: "Presence of colorless proplastids and a bigger nucleus."
- **Analysis**: Meristematic cells contain proplastids, which are small, colorless organelles that can develop into chloroplasts and other plastids. They also have a larger nucleus to facilitate cell division. This statement is correct as well.

5. **Analyzing the Fourth Statement**:
- **Statement**: "Metabolically less active or inert and with a thin cellulosic cell wall."
- **Analysis**: This statement is incorrect because meristematic cells are highly metabolically active due to their role in growth and division. While they do have thin cell walls, describing them as "metabolically less active or inert" contradicts the nature of meristematic cells.

6. **Conclusion**:
- The statement that is not an exclusive characteristic of meristematic cells is the fourth one: "Metabolically less active or inert and with a thin cellulosic cell wall."

### Final Answer:
The incorrect statement is: "Metabolically less active or inert and with a thin cellulosic cell wall."

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