Prickles of Rose are

Options

A. Accessory buds
B. Extra-axillary out growths
C. Endogenous
D. Exogenous

Answer

To solve the question "Prickles of Rose are:", we will analyze the options provided and understand the nature of prickles in roses.

### Step-by-Step Solution:

1. **Understanding Prickles**:
- Prickles are spinous structures found on plants, including roses. They are sharp and stiff, serving the purpose of deterring herbivores and protecting the plant.

2. **Types of Spinous Structures**:
- In botany, we differentiate between thorns, spines, and prickles. Thorns are modified branches, spines are modified leaves, and prickles are outgrowths from the epidermis.

3. **Origin of Prickles**:
- Prickles are derived from the epidermis of the plant. This means they are not specialized structures like thorns or spines but are extensions of the outer layer of the plant.

4. **Location of Prickles**:
- Since prickles can be found all over the plant, they are classified as exogenous structures. This means they originate from the outer tissues of the plant.

5. **Evaluating the Options**:
- Option 1: Accessory buds - Incorrect, as prickles are not buds.
- Option 2: Extra axillary outgrowth - Incorrect, prickles are not specifically axillary.
- Option 3: Endogenous - Incorrect, as prickles are not derived from internal tissues.
- Option 4: Exogenous - Correct, as prickles are derived from the epidermis and are found externally.

6. **Conclusion**:
- Based on the analysis, the correct answer is that prickles of rose are **exogenous**.

### Final Answer:
Prickles of Rose are **exogenous**.

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