Integumentary outgrowht present over the microphyle of Castor is

Options

A. Chalaza
B. Carucnle
C. Aril
D. Wing

Answer

To solve the question regarding the integumentary outgrowth present over the micropyle of Castor, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**: Begin by understanding the key terms in the question. The micropyle is a small opening in the seed through which the pollen tube enters during fertilization. The integument is the outer layer of the ovule that develops into the seed coat.

2. **Identify the Options**: The options provided are chalaza, caruncle, aril, and wing. We need to determine which of these is an integumentary outgrowth at the micropyle of Castor.

3. **Analyze Each Option**:
- **Chalaza**: This is the part of the ovule opposite the micropyle. Therefore, it cannot be the correct answer.
- **Caruncle**: This is a specific outgrowth that is found at the micropylar end of the seed in some plants, including Castor. This is a strong candidate for our answer.
- **Aril**: This is an outgrowth that can cover the seed but is not specifically located at the micropyle. Thus, it is not the correct answer.
- **Wing**: Wings are structures that may be present on seeds for dispersal but are not integumentary outgrowths at the micropyle.

4. **Conclusion**: After analyzing all the options, the integumentary outgrowth present over the micropyle of Castor is identified as the **caruncle**.

5. **Final Answer**: The correct answer is **caruncle**.