Question

What type of placentation is seen in sweet pea ?

• A. Basal
• B. Axial
• C. Free central
• D. Marginal

Answer 1

Answer: (D)

Marginal

• In sweet pea (Pisum sativum), the placentation is marginal, in which, the placenta develops along the junction of two carpels, in a unilocular ovary. In basal placentation, the ovules are few or reduced to one and are borne at the base of ovary e.g. Compositae.

• In axial placentation, margins of carpels fold inwards, fusing together in center of the ovary to form a single central placenta. The ovary is divided into as many locales, as there are carpels, e.g. Hibiscus, Asphodelus. Free-central placentation possesses a placenta arises as a central upgrowth from ovary base, e.g. Stellaria.

So, the correct answer is 'Marginal'.