Describe about pistil (gynoecium).
Identify the type of ovary in diagram
Megasporangium is equivalent to
$A$ : Chalazal vacuole is present in the help cell of embryo sac.
$R$ : Polarity of synergid cytoplasm is opposite to egg cell.
$A$ : Filiform apparatus guides the pollen tube into the synergids.
$R$ : It is special cellular thickening at micropylar tip to secrete chemotropic stimulus.