Acrocarpous solitary sporangia occur in
Funaria
Cycas
Opuntia
Pinus
Funaria male gametes are :
Polyflagellate
Monoflagellate
Biflagellate
Tetraflagellate
androcyte mother cells are formed from the division and re-division of the primary androgonial cell. Each androcyte mother cell divides to form two androcytes. The androcytes transform into biflagellate antherozoids or sperms.