The functional xylem of dicot tree is

Options

A. Sap wood
B. Autumn wood
C. Heart wood
D. Hard wood

Answer

To answer the question "The functional xylem of dicot tree is," we need to understand the structure and function of xylem in dicotyledonous plants.

### Step-by-Step Solution:

1. **Understanding Xylem Structure**:
- Xylem is a type of vascular tissue in plants responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
- In dicot trees, xylem is composed of both primary and secondary xylem.

2. **Identifying Secondary Xylem**:
- Secondary xylem is formed by the activity of the vascular cambium and constitutes the bulk of the wood in trees.
- It is important to note that within the secondary xylem, there are regions that are functional and others that are not.

3. **Functional vs. Non-Functional Xylem**:
- The central part of the xylem, often referred to as heartwood, becomes non-functional over time due to the deposition of substances like tannins and other materials.
- The outer part of the xylem, known as sapwood, remains functional and is responsible for the conduction of water and minerals.

4. **Identifying the Functional Xylem**:
- The functional xylem in a dicot tree is referred to as sapwood.
- Sapwood is the younger, outer rings of secondary xylem that are active in the conduction of water and nutrients.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the functional xylem of a dicot tree is known as **sapwood** (or alburnum).

### Final Answer:
The functional xylem of a dicot tree is **sapwood** (also known as alburnum).

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