They are pipe-like, consisting of a group of specialised cells. They transport substances and form a two-way traffic in plants. Which of the following terms qualify for the features mentioned above?

Options

A. Xylem tissue
B. Vascular tissue
C. Root hairs
D. Phloem tissue

Answer

To solve the question, we need to identify the plant tissue that matches the given features: pipe-like structure, made of specialized cells, capable of transporting substances, and exhibiting two-way traffic. Let's analyze the options step by step:

### Step-by-Step Solution:

1. **Understanding the Features**:
- The tissue is described as "pipe-like."
- It consists of a "group of specialized cells."
- It is responsible for "transporting substances."
- It allows for "two-way traffic" of substances.

2. **Evaluating the Options**:
- **Xylem**:
- Xylem is indeed pipe-like and consists of specialized cells.
- It primarily transports water and minerals from the roots to the leaves (unidirectional).
- Therefore, it does not meet the criteria for two-way traffic.

- **Vascular Tissue**:
- Vascular tissue includes both xylem and phloem.
- While it encompasses the characteristics of both tissues, it does not specifically refer to a single type of tissue that meets all criteria.

- **Root Cells or Root Hairs**:
- Root hairs are involved in the absorption of water and minerals.
- They do not have a pipe-like structure and do not facilitate two-way transport.

- **Phloem Tissue**:
- Phloem is pipe-like and consists of specialized cells.
- It is responsible for transporting food (like starch) from the leaves to other parts of the plant, including roots and stems.
- Phloem allows for bi-directional transport, as it can move substances both upwards and downwards.

3. **Conclusion**:
- Based on the analysis, the only tissue that meets all the criteria of being pipe-like, consisting of specialized cells, transporting substances, and exhibiting two-way traffic is **Phloem Tissue**.

### Final Answer:
**Phloem Tissue**