Question

Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is

• A. Parietal
• B. Free central
• C. Basal
• D. Axile

Answer 1

The Correct Option is A

To solve this question, we need to understand the concept of placentation in plants, specifically focusing on the type where ovules develop on the inner wall of the ovary or in the peripheral part.

1. The question provides us with four options for the placentation type: Parietal, Free central, Basal, and Axile.
2. Parietal Placentation: In this type, ovules are attached to the inner wall of the ovary or the peripheral part of the ovary. This typically occurs in unicarpellary or syncarpous (fused carpels) ovary structures. An example of a plant showing parietal placentation is mustard.
3. Free Central Placentation: Here, the ovules are borne on a central column, free from the ovary wall. This type of placentation can be seen in plants like Dianthus.
4. Basal Placentation: In basal placentation, the ovules are attached to the base of the ovary, seen in plants like sunflower.
5. Axile Placentation: In this type, the ovules are attached to the central axis and the ovary is divided into multiple locules, seen in plants like tomato and lemon.
6. Based on the above definitions, the correct answer is Parietal placentation, as it corresponds to ovules developing on the inner wall of the ovary.

Thus, the placentation in which ovules develop on the inner wall of the ovary or in the peripheral part is Parietal placentation.