In angiosperms embryosac is developed from
Megaspore mother cell
Secondary nucleus
Endothecium
Microspore mother cell
Explain about Embryo sac.
Generally number of integuments in the ovule of angiosperms and gymnosperms is
Definations / Explanation :
$1.$ Egg apparatus
$2.$ filiform apparatus
A pollen tube grows down the style because