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In which type of placentation, the ovule...

In which type of placentation, the ovules develop on the inner wall of the ovary :-

A

Marginal

B

Parietal

C

Axile

D

Free central

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the type of placentation where ovules develop on the inner wall of the ovary. 2. **Defining Placentation**: Placentation refers to the arrangement of ovules within the ovary. It is crucial for connecting the ovary to the ovules. 3. **Identifying Types of Placentation**: There are six main types of placentation: - Marginal - Parietal - Axile - Free central - Superficial - Basal 4. **Analyzing Each Type**: - **Marginal Placentation**: Ovules are lined up along a ridge on one side of the ovary. This does not fit the requirement as it is not on the inner wall. - **Parietal Placentation**: This occurs in multi-carpillary, unilocular, or syncarpous ovaries where the ovules develop on the inner walls or periphery of the ovary. This matches the requirement of the question. - **Axile Placentation**: In this type, the placenta forms a central column and ovules are attached near the placenta, not on the inner wall. - **Free Central Placentation**: Here, ovules are attached to a central axis, which again does not satisfy the question's criteria. - **Superficial and Basal Placentation**: These types also do not involve ovules developing on the inner wall of the ovary. 5. **Conclusion**: Based on the analysis, the correct type of placentation where ovules develop on the inner wall of the ovary is **Parietal Placentation**. **Final Answer**: Parietal Placentation ---
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