Which one of the following is not correct ?

Options

A. Early wood is characterised by large number of xylary elements
B. Early wood is characterised by vessels with wider cavities.
C. Late wood is characterised by large number of xylary elements
D. Late wood is characterised by vessels with narrower cavities

Answer

To determine which statement is not correct regarding early wood and late wood, we will analyze each option based on the characteristics of these types of wood.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Early Wood (Spring Wood)**: This is produced during the spring when the cambium is more active. It is characterized by:
- A larger number of xylem elements.
- Xylem vessels and tracheids with wider lumens.
- Lighter color.

- **Late Wood (Autumn Wood)**: This is produced in the autumn when the cambium is less active. It is characterized by:
- A smaller number of xylem elements.
- Xylem vessels and tracheids with narrower lumens.
- Darker color.

2. **Analyze Each Statement**:
- **Statement A**: Early wood is characterized by a large number of xylem elements.
- This statement is **correct**.

- **Statement B**: Early wood is characterized by vessels with wider cavities.
- This statement is **correct**.

- **Statement C**: Late wood is characterized by a large number of xylem elements.
- This statement is **not correct** because late wood actually has a smaller number of xylem elements.

- **Statement D**: Late wood is characterized by vessels with narrow cavities.
- This statement is **correct**.

3. **Conclusion**:
- The statement that is not correct is **Statement C**: "Late wood is characterized by a large number of xylem elements."

### Final Answer:
The answer is **C**: Late wood is characterized by a large number of xylem elements (this is not correct).

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