Select false statement -

Options

A. In leaves, the ground tissue consists of thin walled chloroplast containing cells which is called mesophyll
B. The stomatal aperture, guard cells and the surrounding subsidiary cells are together called stomatal apparatus
C. The root hairs are unicellular elongation of the epidermal cells.
D. The protophloem has bigger sieve tubes whereas metaphloem has narrow sieve tubes

Answer

To solve the question of selecting the false statement, we will analyze each statement provided in the options step by step.

### Step 1: Analyze Statement A
**Statement A**: "In leaves, the ground tissues consist of thin-walled protoplast containing cells which is called mesophyte."

- **Explanation**: This statement is discussing the ground tissue in leaves. The ground tissue in leaves primarily consists of mesophyll, which is made up of parenchyma cells that have thin walls and contain chloroplasts. Therefore, this statement is true.

### Step 2: Analyze Statement B
**Statement B**: "Stomatal aperture is the guard cells and the surrounding subcellular cells are called stomatal apparatus."

- **Explanation**: This statement defines the stomatal apparatus correctly. The stomatal apparatus consists of the stomatal pore (aperture), guard cells, and subsidiary cells. Hence, this statement is also true.

### Step 3: Analyze Statement C
**Statement C**: "The root hairs are unicellular elongations of the epidermal cells."

- **Explanation**: This statement accurately describes root hairs. Root hairs are indeed unicellular extensions of the epidermal cells that increase the surface area for water and nutrient absorption. Thus, this statement is true.

### Step 4: Analyze Statement D
**Statement D**: "Protofluem has bigger sieve tubes whereas metafluem has narrow sieve tubes."

- **Explanation**: This statement is incorrect. In fact, protoxylem (not protofluem) has narrow sieve tubes, while metaphloem has wider sieve tubes. Therefore, this statement is false.

### Conclusion
After analyzing all the statements, we find that **Statement D** is the false statement.

### Final Answer
The false statement is: **Option D** - "Protofluem has bigger sieve tubes whereas metafluem has narrow sieve tubes."

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