The sequence of development of embryo sac is
Archesporium $→$ megaspore mother cell $→$ megaspore $→$ embryo sac
Archesporium $→ $ megaspore $→$ megaspore mother cell $→$ embryo sac
Archesporium $→$ megaspore $→$ megasporophyte $→$ embryo sac
None of the above
Location and Function :
$1.$ Nucellus
$2.$ Filiform structures
The ovule of an angiosperm is technically equivalent to
Egg apparatus of angiosperm consists of