Perisperm is
Degenerate part of synergids
Peripheral part of endosperm
Degenerate part of secondary nucleus
Remnant of nucellus
Definations / Explanation :
$1.$ Egg apparatus
$2.$ filiform apparatus
The ovule of an angiosperm is technically equivalent to
Synergid's filiform apparatus
The ploidy level of nucellus and female gametophyte respectively is