The stalk of the ovule is called

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.