Monocot embryo consists of one large shield-shaped cotyledon known as:

The scutellum is a ......... .

$A$: Eight cells of the octant stage in dicot embryogeny are formed by $2$ vertical and $1$ transverse division in the embryonal cell.
$R$: These cells are arranged in epibasal and hypobasal tiers.

Meroblastic type of embryo development takes place in

In angiosperms,the oospore on development produces

The apical cell of the $2$-celled pro-embryo in angiosperms undergoes . . . . . . division to form $8$-celled octant pro-embryo.