Question

Plumule is produced from the:
A) Proembryo      
B) Hypophysis
C) Apical octant    
D) Micropylar octant

Answer 1

Hint: Plumule is the part of the plant that grows after radicles. It is responsible for giving rise to the shoot components of the plant. Radicles, on the other hand, give rise to root components. During seed embryonic development, the apical octant gives rise to the plumule region, while the basal octant gives rise to the radicle region.

Step by step solution:
The embryo begins to break through the seed covering once the seed begins to germinate. The Plumule grows and develops as a result of this growth. The Plumule is a crucial component of the seed embryo that later grows into the plant's shoot. Young leaves and stalks grow on the Plumule of the seed as it pokes its head out of the ground. The epicotyl, the juvenile leaves, and the apical meristematic tissue of the shoot are the primary components of the Plumule.
After the sperm and egg nuclei are fertilized, a transverse cell division produces an apical and basal cell, which together makes up a pre-embryo. The apical cell creates the embryo, while the basal cell creates the suspensor. In dicots, the suspensor is often a column of one or more cells.
The embryo's apical octant is where the cotyledons develop, whereas the basal octant is where the major root radicle develops.
Hence, option C is the correct answer
Note:
In the first stage, the zygote divides unevenly into two daughter cells, one apical and one basal cell. In the second or octant stage, the pre-embryo derived from the apical cell is made up of two moieties of four cells each. The basal cell has given rise to a slew of cells, including the hypophysis (h) and suspensor.