Which type of placentation has ovules arranged at the perimeter of the ovary?

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Multiple Choice

Which type of placentation has ovules arranged at the perimeter of the ovary?

Explanation:
Placentation describes how ovules are attached inside the ovary. When the ovules lie along the inner walls and are arranged around the perimeter of the ovary, the placenta forms from the ovary wall itself. This is called parietal placentation, where the ovules are positioned at the periphery rather than along a central axis or at the base. In contrast, basal placentation has ovules at the base; axile placentation has ovules on a central axis within a multi-locular ovary; and free central placentation features a central, unattached column of placentation. So ovules arranged at the perimeter specifically match parietal placentation.

Placentation describes how ovules are attached inside the ovary. When the ovules lie along the inner walls and are arranged around the perimeter of the ovary, the placenta forms from the ovary wall itself. This is called parietal placentation, where the ovules are positioned at the periphery rather than along a central axis or at the base. In contrast, basal placentation has ovules at the base; axile placentation has ovules on a central axis within a multi-locular ovary; and free central placentation features a central, unattached column of placentation. So ovules arranged at the perimeter specifically match parietal placentation.

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