The innermost wall layer of anther:

In the male reproductive whorl of a flower,the archesporial cells are formed by . . . . . . .

How many layers is the pollen grain wall composed of?

The microspore tetrad of an angiosperm,at the time of formation,is surrounded by a callose wall. The breakdown of this wall is brought about by the enzyme callase,which is synthesized by the:

$A$ typical angiosperm anther is:

What is required for the formation of microspores from a microspore mother cell?