In Citrus, Duranta and Bougainvillea, the thorns are the modified

Options

A. axillary buds
B. leaves
C. roots
D. apical bud

Answer

To solve the question regarding the modifications of thorns in Citrus, Duranta, and Bougainvillea, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Thorns**:
- Thorns are hard, pointed structures found on some plants. They can serve various functions, including protection from herbivores and reducing transpiration by limiting leaf surface area.

2. **Identifying the Origin of Thorns**:
- Thorns can be modifications of different plant organs such as leaves, stems, or buds. It is essential to determine which organ the thorns in Citrus, Duranta, and Bougainvillea are derived from.

3. **Analyzing the Options**:
- The options provided are:
- A) Auxiliary buds
- B) Leaves
- C) Roots
- D) Apical bud
- We need to evaluate these options based on the known modifications of thorns.

4. **Evaluating Each Option**:
- **Auxiliary Buds**: These are lateral buds located in the axil of leaves and can develop into shoots or flowers. In Citrus, Duranta, and Bougainvillea, thorns are indeed modifications of these auxiliary buds.
- **Leaves**: While some plants have thorns that are modified leaves, in the case of Citrus, Duranta, and Bougainvillea, this is not the case.
- **Roots**: Thorns are not derived from roots in these plants.
- **Apical Bud**: This is the terminal bud at the tip of the stem and does not form thorns in these species.

5. **Conclusion**:
- Based on the analysis, the correct answer is that in Citrus, Duranta, and Bougainvillea, the thorns are modified **auxiliary buds**.

### Final Answer:
In Citrus, Duranta, and Bougainvillea, the thorns are the modified **auxiliary buds**.

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