Knots are formed in the wood due to

Options

A. external injuries
B. bases of the branches get buried inmain stem
C. leaf scars
D. insect bites

Answer

To answer the question "Knots are formed in the wood due to," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Knots**:
- Knots are blemishes or irregularities found in wood. They can appear as holes, lumps, or bulges on the surface of the wood.

2. **Formation of Knots**:
- Knots typically form due to the natural growth process of trees. As trees grow, their trunks increase in circumference.

3. **Overtaking of Branches**:
- As the trunk expands, it can overtake the branches that are growing out from it. This means that the trunk becomes larger and can envelop the bases of the branches.

4. **Solidification of Wood**:
- The wood around the base of the branches becomes solidified as the trunk continues to grow. This solidification contributes to the formation of knots.

5. **Living Wood Inside Knots**:
- Inside the knots, there is typically living wood. This wood is tougher and denser compared to the surrounding wood.

6. **Conclusion**:
- The primary reason knots are formed is due to the buried bases of branches as they grow and become enveloped by the expanding trunk. Therefore, the correct answer is that knots are formed due to the buried bases of branches.

### Final Answer:
Knots are formed in the wood due to the buried bases of branches.

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