Question

Choose the incorrect statement with respect to a monocot embryo.

• A. In the grass family, the cotyledon is called scutellum is situated towards one side (lateral) of the embryonal axis.
• B. At its lower end, the embryonal axis has the radical and root cap that are enclosed in a sheath called coleorhiza
• C. Portion of the embryonal axis above the level of attachment of scutellum is the hypocotyl
• D. Epicotyl has structures enclosed in a hollow foliar structure, the coleoptile

Answer 1

The correct option is C Portion of the embryonal axis above the level of attachment of scutellum is the hypocotyl

Embryos of monocotyledons possess only one cotyledon. In the grass family (Gramineae) the cotyledon is called scutellum that is situated towards one side (lateral) of the embryonal axis. At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorhiza.

The portion of the embryonal axis above the level of attachment of scutellum is the epicotyl. Epicotyl has a shoot apex and a few leaf primordia enclosed in a hollow foliar structure, the coleoptile.

Both monocot and dicot embryos have a plumule that forms the leaves, a hypocotyl that forms the stem, and a radicle that forms the root. In dicots, the hypocotyls extend above ground, giving rise to the stem of the plant, while in monocots, they remain below ground.