An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is

Options

A. hemitropous
B. campylotropous
C. anatropous
D. amphitropous

Answer

To solve the question regarding the type of ovule that becomes curved such that the nucellus and embryo sac lie at right angles to the funicle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific type of ovule that has a particular curvature, where the nucellus and embryo sac are positioned at right angles to the funicle.

2. **Identify Key Terms**:
- **Ovule**: The structure in seed plants that develops into a seed after fertilization.
- **Nucellus**: The central part of the ovule, containing the embryo sac.
- **Embryo Sac**: The female gametophyte within the ovule.
- **Funicle**: The stalk that attaches the ovule to the ovary wall.

3. **Analyze the Options**: The options provided are:
- Hemitropus
- Embryotropus
- Anotropus
- Amphitropus

4. **Define Each Type**:
- **Hemitropus**: The ovule is curved such that the nucellus and embryo sac are at right angles to the funicle.
- **Embryotropus**: The ovule is bent in a way that the micropyle is not in line with the funicle.
- **Anotropus**: The ovule is completely inverted.
- **Amphitropus**: The ovule has both ends presented, with the nucellus and embryo sac at both ends.

5. **Determine the Correct Answer**: Based on the definitions, the type of ovule where the nucellus and embryo sac lie at right angles to the funicle is **Hemitropus**.

6. **Conclusion**: Therefore, the correct answer is **Hemitropus**.

### Final Answer:
The ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is **Hemitropus**.

---