Question

In Argemone, placentation is

• A. marginal
• B. parietal
• C. axile
• D. basal

Answer 1

The correct option is B parietal

Parietal placentation is found in unilocular syncarpus ovary and ovule is formed by the fusion of two or more carpels by their adjacent margins and two or more placenta forms. For example - mustard and Argemone.


Marginal placentation is found in the monocarpellary gynoecium the placenta develops along the junction of two fused margins. For example - pea.

Axile placentation is found in multicarpellary syncarpous gynoecium. The fusing margin of carpels grows inward and meets in the centre of the ovary. Thus, an axis forms in the centre of ovary and ovary becomes multichambered. For example - tomato.

In basal placentation, the ovary is unilocular and a single ovule is borne at the base of ovary. For example - marigold, sunflower.

Hence, the correct answer is parietal.