Question

Two dry fruits ($A$ and $B$) were observed, both developed from unilocular ovaries of monocarpellary gynoecia. In fruit $A$, pericarp and seed coat are free. It liberated the seeds only after the disintegration of the pericap. Fruit $B$ dehisced dorsiventrally librating the seeds. In the following the former in the pair represents $A$ and latter $B$ to which types of fruits $A$ and $B$ respectively belong?

• A. Achene and legume
• B. Nut and follicle
• C. Cypsella and siliqua
• D. Pyxidium and speticidal capsule

Answer 1

Answer: (A)

Achene and legume

In achene fruits, the thin dry pericarp is free from seed except at one point and forms monocarpellary pistil having superior unilocular and uniovuled ovary, e.g., Four O' Clock (Mirabilis jalapa), Boerhaavia. It is more common in aggregate fruits. A legume fruit is formed from the superior unilocular ovary of a monocarpellary pistil having marginal placentation e.g., members of family Leguminosae (Pea, Abrus).

So, the correct answer is option A.