Choose the correct option for $PMC$. (in $n$)

Where are the microsporangia located?

In angiosperms,the male gametes are produced by the division of which of the following?

During meiosis in a pollen mother cell, the daughter cells are interconnected by cytoplasmic passages. The whole structure is called:

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:

What do '$c$' and '$d$' represent in the given figure?