Tag: seeds - structure and germination

Embryonic tissue in plants refers to the actively growing cells but more than often this term is used to describe the early formation of tissue during its first growth stages. It thus refers to the sporophyte, gametophyte embryos from seedlings as well as meristematic tissues which are always in embryonic state. Under this condition, the growth of this tissues takes place through cell division and the cells of the embryo divide.

Dicots showing parallel venation are Calophyllum and Corymbium. 

The stems of monocots are usually unbranched and fleshy. They do not grow thicker from year to year. New leaves often grow wrapped in a protective sheath formed by the older leaf.

Monocots have floral parts in multiples of three and the seed contains one cotyledon. 

The scutellum is part of the structure of a barley and rice seed, the modified seed leaf. The scutellum can also refer to the equivalence of a thin cotyledon in monocots. It is very thin with high surface area and serves to absorb nutrients from the endosperm during germination. The scutellum is believed to contain an as yet unidentified protein transporter that facilitates starch movement from the endosperm to the embryo.
Thus, the correct answer is option B.

The scutellum is part of the structure of a barley and rice seed, the modified seed leaf. The scutellum can also refer to the equivalence of a thin cotyledon in monocots. It is very thin with high surface area and serves to absorb nutrients from the endosperm during germination. The scutellum is believed to contain an as yet unidentified protein transporter that facilitates starch movement from the endosperm to the embryo.
Thus, the correct answer is option A.

Plants are classified into two main groups: the bryophytes (nonvascular plants) and the tracheophytes (vascular plants). The tracheophytes include ferns, gymnosperms and angiosperms, and are characterized by specialized vascular tissues- the phloem and xylem. The study of living species suggests that angiosperms evolved from the gnetophytes, a group of gymnosperms. however, the oldest known angiosperms were a diverse group of plants called magnoliids from which dicots and monocots are evolved. Monocots are more advanced plants than dicot.

The single shield shaped cotyledon of maize is called as scutellum. In maize grain, scutellum is characteristically present, which is a modified cotyledon. The scutellum is part of the structure of a  seedthe modified seed leaf. The scutellum can also refer to the equivalence of a thin cotyledon in monocots. It is very thin with high surface area and serves to absorb nutrients from the endosperm during germination. The scutellum is believed to contain an as yet unidentified protein transporter that facilitates starch movement from the endosperm to the embryo.
Therefore, the correct answer is option D.

A seed in which micropyle and hilum cannot be traced is maize. In maize, the pericarp of the fruit is fused with the seed coat referred to as caryopsis, typical of the grasses, and the entire kernel is often referred to as the seed. The cob is close to a multiple fruit in structure, except that the individual fruits, the kernels never fuse into a single mass. 

In maize grain, scutellum is characteristically present, which is a modified cotyledon. The scutellum is part of the structure of a  seedthe modified seed leaf. The scutellum can also refer to the equivalence of a thin cotyledon in monocots. It is very thin with high surface area and serves to absorb nutrients from the endosperm during germination. The scutellum is believed to contain an as yet unidentified protein transporter that facilitates starch movement from the endosperm to the embryo.
Therefore, the correct answer is option B.