Thorns are modifications of stem because they

Options

A. arise from the buds in the axil of leaves
B. arise from roots
C. is part of the plant
D. are defensive organs against grazing animals

Answer

**Step-by-Step Solution:**

1. **Understanding Thorns**: Thorns are specialized structures found on certain plants. They are sharp, pointed, and serve as a defense mechanism against herbivores.

2. **Origin of Thorns**: Thorns are modifications of stems. They specifically arise from the buds located in the axil of leaves. This means that instead of a branch developing from the bud, a thorn forms in its place.

3. **Distinguishing Features**: It is important to note that thorns are not derived from roots or any other part of the plant. They are specifically stem modifications.

4. **Defensive Function**: While thorns serve as a defense mechanism against grazing animals, not all defensive structures in plants are classified as thorns. For example, some plants may produce toxic chemicals or other deterrents that are not thorns.

5. **Conclusion**: Therefore, the correct statement is that thorns are modifications of stems because they arise from buds in the axil of leaves.

**Final Answer**: Thorns are modifications of stem because they arise from buds in the axil of leaves.

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