In hemitropous ovule which one lies nearer

Options

A. Hilum and micropyle
B. Chalaza and micropyle
C. Hilum and chalaza
D. None, hilum is equidistant to micropyle and chalaza.

Answer

To solve the question "In hemitropous ovule which one lies nearer?", we will analyze the structure of a hemitropous ovule and its components.

### Step-by-Step Solution:

1. **Understanding Hemitropous Ovule**:
- A hemitropous ovule is characterized by a 90-degree turn in the body of the ovule. This means that the orientation of the ovule is altered, affecting the relative positions of its parts.

2. **Identifying Key Components**:
- The main components of the ovule include:
- **Micropyle**: The opening through which the pollen tube enters.
- **Chalaza**: The end of the ovule opposite the micropyle.
- **Hilum**: The point of attachment of the ovule to the ovary wall.

3. **Analyzing Positions**:
- In a hemitropous ovule, the micropyle and chalaza are aligned in a straight line, but the body of the ovule is turned at a right angle (90 degrees) to this line.
- The hilum is positioned such that it is equidistant from both the micropyle and chalaza.

4. **Evaluating Options**:
- Option A: Hilum and micropyle - Not correct, as the hilum is not nearer to the micropyle than to the chalaza.
- Option B: Chalaza and micropyle - Not correct, as both are at a distance from each other.
- Option C: Hilum and chalaza - Not correct, as the hilum is equidistant to both.
- Option D: Nil, hilum is equidistant to micropyle and chalaza - Correct, as the hilum is indeed equidistant from both the micropyle and chalaza.

5. **Conclusion**:
- Therefore, the correct answer is **Option D**: Hilum is equidistant to micropyle and chalaza.