Which structure forms the sheath enclosing the plumule in a germinating monocot seed?

Which structure forms the sheath enclosing the plumule in a germinating monocot seed?

• A. Coleorhiza
• B. Coleoptile
• C. Scutellum
• D. Pulvinus

Answer: (B)

During germination in monocots, the shoot part of the embryo is enclosed by a protective sheath called the coleoptile. This hollow, sleeve-like structure shields the developing plumule as it pushes upward through the soil, ensuring the delicate shoot remains protected until it reaches the surface. The radicle is protected by the coleorhiza, the scutellum is the single cotyledon in grasses that aids nutrient transfer from the endosperm, and the pulvinus is a leaf-base organ involved in movement. So the sheath around the plumule is the coleoptile.

During germination in monocots, the shoot part of the embryo is enclosed by a protective sheath called the coleoptile. This hollow, sleeve-like structure shields the developing plumule as it pushes upward through the soil, ensuring the delicate shoot remains protected until it reaches the surface. The radicle is protected by the coleorhiza, the scutellum is the single cotyledon in grasses that aids nutrient transfer from the endosperm, and the pulvinus is a leaf-base organ involved in movement. So the sheath around the plumule is the coleoptile.