Stereome is

Options

A. vascular tissue
B. phloem
C. collenchyma
D. mechanical tissue.

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about "stereome" and provides four options: vascular tissue, phloem, collenchyma, and mechanical tissue.

2. **Analyzing the Options**:
- **Option 1: Vascular Tissue**: This type of tissue is responsible for the transportation of water, nutrients, and minerals within the plant. It does not directly relate to the structural support of the plant.
- **Option 2: Phloem**: Phloem is a type of vascular tissue specifically involved in the translocation of organic nutrients, primarily sugars. It is not a mechanical tissue.
- **Option 3: Collenchyma**: This is a type of simple, permanent tissue that provides mechanical support and elasticity to young stems and leaves. It is a type of mechanical tissue but not the only one.
- **Option 4: Mechanical Tissue**: This term refers to tissues that provide structural support and strength to the plant. It includes both collenchyma and sclerenchyma.

3. **Identifying the Correct Answer**: The term "stereome" refers to a type of mechanical tissue that provides structural support. Since it can be associated with both collenchyma and sclerenchyma, the most appropriate classification for stereome is as a mechanical tissue.

4. **Conclusion**: Based on the analysis, the correct answer is that stereome is a **mechanical tissue**.

### Final Answer:
Stereome is a mechanical tissue.

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