The following diagram shows an endospermic seed of Maize grain. Answer the following question:

In diagram the sheath which covers radicle is shown by ?

D

The correct answer is Option (4) – D

At the lower end of the embryonal axis, there is a structure called the coleorrhiza, which encloses the radicle (root tip) and the root cap. The coleorrhiza is an undifferentiated sheath.

Above the point where the scutellum is attached, the embryonal axis continues as the epicotyl. The epicotyl contains a shoot apex and a few leaf primordia. Enclosing these structures is a hollow foliar structure known as the coleoptile.