When ovule is straight with funiculus, embryo sac, chalaza and micropyle lying iin a straight vertical line, it is known as

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of the Ovule**:
- The ovule is a crucial part of the plant reproductive system. It contains the embryo sac, which houses the egg apparatus, polar nuclei, and antipodal cells.
- The ovule is attached to the placenta via a structure called the funiculus.

2. **Identifying the Components**:
- The ovule consists of several parts:
- **Funiculus**: The stalk that connects the ovule to the ovary wall.
- **Embryo Sac**: Contains the female gametes.
- **Chalaza**: The basal part of the ovule.
- **Micropyle**: The opening at the opposite end of the chalaza where fertilization occurs.

3. **Arrangement of the Components**:
- In certain types of ovules, the funiculus, embryo sac, chalaza, and micropyle are aligned in a straight vertical line.

4. **Identifying the Type of Ovule**:
- When the ovule is arranged in this straight line, it is referred to as **orthotropous**.
- This arrangement is commonly found in gymnosperms and some angiosperms, particularly those of the Polygonium type.

5. **Conclusion**:
- The correct answer to the question is that when the ovule is straight with the funiculus, embryo sac, chalaza, and micropyle lying in a straight vertical line, it is known as **orthotropous**.