Male gametes in angiosperms are formed by the division of
generative cell
vegetative cell
microspore mother cell
microspore.
An event unique to angiosperms is
Xenia and metaxenia terms are related with
$A$ : In sporoderm, pectocellulosic layer is surrounded by sporopollenin.
$R$ : Exine is differentiated into outer ektexine and inner endexine.
In Capsella meiosis takes place during
Ruminate endosperm is commonly found in seeds of