The function of endothecium is
Endothecium and tapetum in anther are derived from
The microspore tetrad of angiosperm at the time of formation, are surrounded by a callose wall. Breakdown of this wall is brought about by the enzyme callase synthesized by the
Members of which plant family, pollen grains maintain viability for months ?
Examine the figure given below and select the right option giving all the four parts $a, b, c$ and $d.$ Correctly identify
$a\quad \;b\quad\;c\quad\;d$