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Question

In a unilocular ovary, the ovules develop on the inner wall of the ovary. This type of placentation is called

A
basal
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B
axile
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C
parietal
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D
free central
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Solution

The correct option is C parietal
The arrangement of ovules in the ovary is called placentation. The ovary is made up of chambers called as locules in which the ovules are attached.

Parietal placentation : The ovules develop on the inner wall of the ovary or on peripheral parts, as seen in Cucurbita.

Axile placentation: When the placenta is axial and the ovules are attached to it in a multilocular ovary, the placentation is said to be axile, as in china rose, tomato and lemon

Basal placentation: When one or few ovules develop at the base of a simple or compound ovary as seen in tomatoes.

Free Central : The ovules are borne on the central axis and septa are absent. It is seen in primrose and Dianthus.

Marginal placentation : The ovules are arranged in two rows on the margins of the ovary as seen in pea.


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