Which among the structure has an elongated , unbranched, pointed , and needle-like apices ?

Options

A. Phloem parenchyma
B. Phloem fibre
C. Companion cells
D. Sieve tubes

Answer

To solve the question regarding which structure has an elongated, unbranched, pointed, and needle-like apices, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a structure that is elongated, unbranched, pointed, and has needle-like tips. This description is specific and suggests a particular type of cell or tissue.

2. **Identify the Context**: The question is related to plant biology, specifically the types of cells found in phloem tissue. Phloem is one of the two types of vascular tissues in plants, responsible for the transport of nutrients, particularly sugars.

3. **Review the Options**: The options provided are likely different types of cells associated with phloem. Common types include:
- Sieve tubes
- Companion cells
- Phloem parenchyma
- Phloem fibers

4. **Analyze Each Option**:
- **Sieve Tubes**: These are cylindrical and arranged longitudinally but are not pointed or needle-like.
- **Companion Cells**: These are not elongated or pointed; they assist sieve tubes.
- **Phloem Parenchyma**: These cells are involved in storage and do not have pointed tips.
- **Phloem Fibers**: These are elongated, unbranched, and have pointed, needle-like apices.

5. **Select the Correct Answer**: Based on the analysis, phloem fibers match the description provided in the question. They are elongated, unbranched, and have sharp, needle-like tips.

6. **Conclusion**: The correct answer is **Phloem Fibers**.

### Final Answer:
**Phloem Fibers** (Option B) are the structures that have elongated, unbranched, pointed, and needle-like apices.

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