Question

Collar like outgrowth arising from the base of ovule and forming a sort of third integument is known as

• A. Caruncle
• B. Aril
• C. Operculum
• D. Perisperm

Answer 1

The correct option is B Aril

In the angiosperms, ovule is found that contains embryo sac. The ovule is the basis of female reproductive structure that further develops into a seed after fertilization. Funicle is the stalk found in the ovule that attaches the ovule to the placenta. The points where the funicle is attached to the ovule body are called hilum. The ovule is surrounded by one or two layers that provide protection to the developing embryo. A fleshy bright colored appendage or covering arises from the funicle that covers the seed is called aril. It forms a sort of the third type of integument. On one side of the ovule, a pore-like structure called micropyle is present where integuments are absent. Nucellus is the mass of cells surrounded by the integuments from the outside. These cells have food reserves. In the nucellus, female gametophyte is located which is covered by a thin membrane.