Anther is generally composed of

In angiosperms,the four microspores of a tetrad are covered by a layer which is made up of:

In monocots,the male gametophyte is represented by:

In wheat and rice, how long does the pollen grain remain viable after being released?

When mature anthers of $Datura$ $innoxia$ are cultured in a culture medium supplemented with phytohormones named kinetin,coconut milk,and plum juice,several embryos can be obtained floating inside the microsporangia. These embryos can develop into plants that are:

What is the exine of a pollen grain made of?