Microsporogenesis is a synonym for:

In angiosperms,two non-motile male gametes are produced by the division of the:

Which of the following represents the male gametophyte in flowering plants?

The intine of pollen grains is composed of

If the cells of the root in a wheat plant have $42$ chromosomes,then the number of chromosomes in the cell of a pollen grain is:

One pollen mother cell may produce four germinating pollen grains,each with two male nuclei and one tube nucleus. How many meiotic divisions are necessary to bring this about?