In a pollen grain, larger nucleus is
Generative nucleus
Tube nucleus
Vemgetative nucleus
None of these
Pollens have two prominent walls which are ... $A$... and ... $B$ .... Here $A$ and $B$ refers to
Endothecium layer of anther lobes is present
Microsporogenesis is
The function of endothecium is
In plants meiosis occurs in