Placentation type seen in unilocular ovaries
I. Parietal II. Basal
III. Axile IV. Marginal
V. Free central

Options

A. All except IV
B. All except III
C. All except II
D. All except I

Answer

To determine the types of placentation seen in unilocular ovaries, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Unilocular Ovaries**:
- A unilocular ovary is one that has a single chamber and does not have any internal partitions (septa). This means that all ovules are contained within one space.

2. **Analyzing Each Type of Placentation**:
- **I. Parietal Placentation**:
- In parietal placentation, ovules are attached to the inner wall of the ovary. This type can occur in unilocular ovaries, such as in the mustard family.
- **Conclusion**: Yes, parietal placentation can be found in unilocular ovaries.

- **II. Basal Placentation**:
- In basal placentation, there is typically one ovule located at the base of the ovary. This type also occurs in unilocular ovaries, as seen in sunflowers.
- **Conclusion**: Yes, basal placentation can be found in unilocular ovaries.

- **III. Axile Placentation**:
- Axile placentation involves ovules arranged along the central axis of a multilocular ovary, meaning it has internal partitions. Therefore, it cannot be found in unilocular ovaries.
- **Conclusion**: No, axile placentation cannot be found in unilocular ovaries.

- **IV. Marginal Placentation**:
- In marginal placentation, ovules are arranged along the margin of the ovary. This type typically occurs in a unilocular ovary, as seen in peas.
- **Conclusion**: Yes, marginal placentation can be found in unilocular ovaries.

- **V. Free Central Placentation**:
- Free central placentation has ovules attached to a central column within a multilocular ovary. This type cannot occur in unilocular ovaries.
- **Conclusion**: No, free central placentation cannot be found in unilocular ovaries.

3. **Final Answer**:
- The types of placentation that can be found in unilocular ovaries are:
- I. Parietal
- II. Basal
- IV. Marginal