ovule in which funicle, chalaza and micropyle occur in one vertical plane is

Options

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

Answer

To determine which type of ovule has the funicle, chalaza, and micropyle all in one vertical plane, we can analyze the options provided:

1. **Campylotropis**: In Campylotropous ovules, the structure is curved, causing the micropyle and hilum not to lie in a straight line. Therefore, this option is incorrect.

2. **Amphitropis**: Amphitropous ovules are also curved and have a horseshoe shape. This means that the funicle, chalaza, and micropyle do not align in a vertical plane. Hence, this option is also incorrect.

3. **Orthotropis**: Orthotropous ovules are characterized by having the funicle, chalaza, and micropyle all aligned in a straight line. This means they occur in one vertical plane, making this option correct.

4. **Anatropis**: Anatropous ovules are those that have undergone a 180-degree turn, bringing the micropyle close to the hilum. This arrangement does not keep the funicle, chalaza, and micropyle in a straight line, so this option is incorrect.

Based on the analysis above, the correct answer is **Orthotropis**.

### Step-by-Step Solution:
1. **Identify the types of ovules**: Understand the characteristics of Campylotropis, Amphitropis, Orthotropis, and Anatropis.
2. **Analyze Campylotropis**: Recognize that the funicle and micropyle do not align straight in this type.
3. **Analyze Amphitropis**: Note that this type is also curved and does not have a straight alignment.
4. **Analyze Orthotropis**: Confirm that in Orthotropous ovules, the funicle, chalaza, and micropyle are aligned in a straight line.
5. **Analyze Anatropis**: Understand that this type has a 180-degree turn, which disrupts the straight alignment.
6. **Conclude**: Based on the analysis, determine that the correct answer is Orthotropis.