Question

The arrangement of the ovules on the placenta developed from the central axis of the ovary is called _____________.

• A. Pariental placentation
• B. Axile placentation
• C. Basal placentation
• D. Marginal placentation

Answer 1

The correct option is B Axile placentation

• In parietal placentation, ovules are developed on the wall or slight outgrowths of the wall, formed with broken partitions within the compound ovary.
• In axile placentation, the ovules are placed on the placentae that develop on the central axis of the ovary. This type of placentation in which carpels are folded inbound with ovules placed along the central axis of the ovary. The placenta is axial. Its ovules are developed at the angles where the septa join the central placenta.
• In basal placentation, one or a few ovules develop at the base of a simple or compound ovary.
• In marginal placentation ovules borne on the wall along the ventral suture of a simple ovary.

Hence, the correct answer is 'Axile placentation'.