Question

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?
A. Plumule
B. Cotyledon
C. Endosperm
D. Aleurone layer

Answer 1

Hint:-The scutellum ( from the Latin scutella meaning small shield) is thought to be a modified cotyledon or seed leaf. In grasses this seed leaf never develops into a green structure but serves only to digest endosperm and transfer nutrients to the rest of the embryo.

Complete step-by-step solution:-
Let us know the details about structures given in question:
The scutellum is known to be a part of the structure of the seeds of barley and rice. The scutellum can also refer to equivalence of a thin cotyledon in monocots. It is very thin with high area and serves to soak up nutrients from the endosperm during germination.
The plumule is a part of a seed embryo that develops into the shoot bearing the primary true leaves of a plant. In most seeds, for instance the sunflower, the plumule may be a small conical structure with none leaf structure. Growth of the plumule does not occur until the cotyledons have grown above the groundCotyledon is an embryonic leaf in seed bearing plants, one or more of which are the primary leaves to seem from a germinating seed.The endosperm may be a tissue produced inside the seeds of most of the flowering plants following fertilization. In most of the species, it is known to be triploid. It surrounds the embryo and provides nutrition within the sort of starch, though it also can contain oils and protein.
The protein found in protein granules of maturing seeds and tubers is known as an aleurone layer. The term also describes one of the two major cell types of the endosperm, aleurone layer. The aleurone layer is the outermost layer of the endosperm, followed by the inner starchy endosperm.
So, the correct answer is option B.

Note:- The scutellum is believed to contain an unidentified protein transporter which facilitates start movement from the endosperm to the embryo. It serves only to digest endosperm and transfer nutrients to the rest of the embryo.