Diameter of pollen grain
$25-50$ $A^o$
$25-50$ micron
$20-25$ micrometre
$25-50$ micrometre
The function of endothecium is
Identify $A$ to $D$ in the following diagram
Tapetum is a part of
Pollens have two prominent walls which are ... $A$... and ... $B$ .... Here $A$ and $B$ refers to
Arrange the following terms in the correct developmental sequence: Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes