If the ovule is curved 180 angle, it is called

Options

A. Orthotropous
B. Anatropous
C. Amphitropous
D. Hemianatropous

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks what type of ovule is formed when it is curved at a 180-degree angle.

2. **Identifying Types of Ovules**: There are four main types of ovules based on their curvature:
- Orthotropous: No curvature (0 degrees).
- Anatropos: Curved at 180 degrees.
- Amphitropous: Curved at less than 180 degrees.
- Hemianatropous: Curved at 90 degrees.

3. **Analyzing the Options**:
- **Orthotropous**: This type has the micropyle, embryo sac, and chalaza in a straight line, indicating no curvature.
- **Anatropos**: This type has the micropyle positioned directly opposite to the chalaza, indicating a complete 180-degree curvature.
- **Amphitropous**: This type has a curvature that is less than 180 degrees.
- **Hemianatropous**: This type has a 90-degree curvature.

4. **Conclusion**: Since the question specifies a 180-degree curvature, the correct answer is **Anatropos**.

### Final Answer:
The ovule that is curved at a 180-degree angle is called **Anatropos**.

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