The gametophyte is protandric ( a hermaphrodite, first antheridia are developed that give antherozoids, and then the archegonia that gives the oospheres ).
2.
In others the monoecious condition is complicated by the development of the antheridium before the formation of the oogonium, thus preventing fertilization by antherozoids of the same alga.
3.
Nalrix is the name of a water snake, given to a plant whose pollen tube discharges ciliated antherozoids which swim ( just like a water snake ) before entering the embryo sac.
परिभाषा
a motile male gamete of a plant such as an alga or fern or gymnosperm पर्याय: spermatozoid,
मोबाइल