Question

In dicot embryo, the radicle is formed by:
A) Epibasal tier of embryo
B) Hypobasal tier of embryo
C) Hypophysis of suspensor
D) Terminal cell of suspensor

Answer 1

Hint: The hypophysis of the suspensor forms the radicle and root cap in the dicot embryo. The epibasal tier is where the epicotyl, plumule, and cotyledons are created. The suspensor's terminal cells swell and take on the role of the haustorium.


Step by step solution:
The basal cell undergoes numerous transverse divisions to create the suspensor, a row of cells. The hypophysis, which is the terminal or lowest cell of the suspensor, aids in the absorption of nutrients. a suspensor terminal cell that participates in nutrient absorption.
The radicle develops in the dicot embryo by Hypophysis of the suspensorTerminal cell of the suspensorEpibasal tier of the embryoHypobasal tier of the embryo.
While the hypobasal tier only produces the hypocotyl and the majority of the radicle, the epibasal tier develops two cotyledons and a plumule. The ground meristem, protoderm, and procambium are produced by the periclinal divisions of the octant embryo.
During seed maturity, the suspensor, a transitory structure, experiences programmed cell death. Suspensor cells may have embryogenic potential, but the embryo suppresses this ability.
Hence, option C is the correct answer.

Note:
The micropyle aperture of the integuments is located opposite the chalaza in plant ovules. A basic cell is a broad name for relatively undifferentiated cells in an epithelial sheet that operate as stem cells to give rise to more specialised cells. It is the tissue where the integuments and nucleus are united.