Alternate name of heart wood is

Options

A. duramen
B. alburnum
C. primary xylem
D. spring wood

Answer

To answer the question about the alternate name of heartwood, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure**: Heartwood is a part of the tree's trunk, specifically the inner core of the wood. It is formed from the older xylem and is typically darker in color than the surrounding wood.

2. **Identify the Options**: The options provided are:
- Duramen
- Alburnum
- Primary Xylem
- Springwood

3. **Analyze Each Option**:
- **Springwood**: Also known as Earlywood, this is the wood that forms in the spring when the growth of the tree is rapid. It is not related to heartwood.
- **Primary Xylem**: This is the first xylem formed during the development of the plant and is responsible for transporting water and minerals. It is also referred to as hydromel, not heartwood.
- **Alburnum**: This is the outer part of the wood, also known as sapwood. It is the younger, functional part of the xylem that conducts water and nutrients.
- **Duramen**: This is the term used for heartwood. It is the older, non-conducting part of the xylem that provides structural support.

4. **Conclusion**: After analyzing all the options, we find that the correct alternate name for heartwood is **Duramen**.

### Final Answer:
The alternate name of heartwood is **Duramen**.