Thorn of Bougainvillea is modified

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Bougainvillea:**
- Bougainvillea is a flowering plant known for its vibrant colors and thorny branches. The thorns are a prominent feature of this plant.

2. **Identifying the Nature of Thorns:**
- Thorns are modified structures that serve various functions in plants, primarily for protection against herbivores.

3. **Analyzing the Modification of Thorns:**
- In Bougainvillea, the thorns are not just simple protective structures; they are actually modified from axillary buds. This means that what we see as thorns are transformed versions of the buds that would typically develop into branches or flowers.

4. **Distinguishing Between Different Plant Parts:**
- To clarify, we need to differentiate between stems, leaves, floral buds, and roots:
- **Stems**: The main support structure of the plant.
- **Leaves**: The photosynthetic organs of the plant.
- **Floral Buds**: The structures that develop into flowers.
- **Roots**: The underground part of the plant that absorbs water and nutrients.

5. **Conclusion:**
- Since the thorns of Bougainvillea are derived from axillary buds, which can also be referred to as floral buds, we conclude that the correct answer is that the thorns of Bougainvillea are modified into floral buds.

**Final Answer:**
The thorns of Bougainvillea are modified into floral buds (axillary buds).

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