During embryonal development in angiosperms, hypocotyl and a part of the radicle is formed by the lower tier of cells of the octant, whereas the other part of the radicle and root cap are formed by ____.

Step-by-step solution

During embryonal development in dicot angiosperms, the zygote divides to form a terminal cell and a basal cell. The terminal cell develops into an octant stage proembryo. The upper tier of cells of the octant gives rise to the plumule and cotyledons. The lower tier of cells of the octant forms the hypocotyl and a part of the radicle. The basal cell forms the suspensor. The uppermost cell of the suspensor, which is situated just below the embryonal mass, is called the hypophysis. The hypophysis undergoes divisions t