Each of these microspores, after further mitoses, becomes a pollen grain ( microgametophyte ) containing two haploid generative ( sperm ) cells and a tube nucleus.
2.
The sperms are interconnected and dimorphic, the large one, in a number of plants, is also linked to the tube nucleus and the interconnected sperm and the tube nucleus form the " male germ unit ".
3.
The sperms are interconnected and dimorphic, the large one, in a number of plants, is also linked to the tube nucleus and the interconnected sperm and the tube nucleus form the " male germ unit ".
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