A piece of wood having no vessels (trachea) must be belong to

Options

A. Teak
B. Mango
C. Pine
D. Palm

Answer

To determine which type of wood lacks vessels (trachea), we need to analyze the characteristics of the options provided: teak, mango, pine, and palm.

### Step-by-Step Solution:

1. **Understanding Vessels and Tracheids**:
- Vessels (trachea) are specialized structures found in the xylem of many vascular plants. They are primarily present in angiosperms (flowering plants).
- Tracheids are another type of water-conducting cell found in the xylem, which are present in both gymnosperms and angiosperms.

2. **Identifying the Types of Plants**:
- **Teak**: This is an angiosperm, which means it has a well-developed vascular system including vessels.
- **Mango**: This is also an angiosperm and has vessels in its xylem.
- **Pine**: This is a gymnosperm. Gymnosperms typically do not have vessels; instead, they primarily have tracheids.
- **Palm**: This is another angiosperm, which also contains vessels.

3. **Conclusion**:
- Since the question specifies a piece of wood with no vessels (trachea), we can conclude that it must belong to a gymnosperm. Among the options given, pine is the only gymnosperm.

Therefore, the correct answer is **pine**.