Which one of the following character causes cross pollination
Cleistogamy
Dichogamy
Homogamy
All the above
$A$ : In sporoderm, pectocellulosic layer is surrounded by sporopollenin.
$R$ : Exine is differentiated into outer ektexine and inner endexine.
Filiform apparatus is a characteristic feature of
Examine the figures $(A-D)$ given below and select the right option out of $(a -d)$, in which all the four structures $A, B, C$ and $D$ are identified correctly.
Endosperm is the result of
The insect Blastophaga grossorum is associated with the pollination of