In flowering plants, a mature 'male gametophyte' is derived from a 'pollen mother cell' by
Three mitotic divisions
One meiotic and two mitotic divisions
Two meiotic divisions
A single meiotic division
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
Location and Function : Endothecium and Tapetum
Which statement is incorrect?
First three layers of microsporangium which does the function of protection are
The germpores on the pollen grains are found on the