Thorn develops from-

Options

A. Root
B. Leaf
C. Axillary bud
D. Stem

Answer

**Step-by-Step Solution:**

1. **Understanding Thorn Development**: Thorns are specialized structures found in some plants. They are typically sharp and rigid, serving primarily as a defense mechanism against herbivores.

2. **Identifying the Origin**: Thorns can develop from different parts of the plant. The options provided are root, leaf, axillary bud, and stem.

3. **Analyzing Each Option**:
- **Root**: Roots generally do not develop into thorns. They are primarily involved in anchoring the plant and absorbing nutrients and water.
- **Leaf**: While some plants have modified leaves that can serve as spines (like cacti), true thorns are not derived from leaves.
- **Axillary Bud**: Axillary buds can give rise to branches or flowers, but they do not typically develop into thorns.
- **Stem**: Thorns are most commonly derived from the stem of the plant. They can emerge from nodes and internodes as stiff outgrowths.

4. **Conclusion**: Based on the analysis, the correct answer is that thorns develop from the stem.

**Final Answer**: Thorn develops from the stem.

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