Dun Aengus. Dun DÃºn aengus is the most famous of several prehistoric forts on The Aran, islands Of. Co. Galway. ireland
The female gametophyteâspecifically termed a megagametophyte âis also called the embryo sac in angiosperms. The megagametophyte produces an egg cell (or several egg cells in some groups) for the purpose of fertilization.he ovary of the gynoecium produces one or more ovules and ultimately becomes the fruit wall. Ovules are attached to the placenta in the ovary through a stalk-like structure known as a funiculus (plural, funiculi). Different patterns of ovule attachment, or placentation, can be found among plant species, these include:
Gametophyte size ranges from three cells (in pollen) to several million (in a lower plant such as moss). Alternation of generations occurs in plants, where the sporophyte phase is succeeded by the gametophyte phase.The sporophyte phase produces spores by meiosis within a sporangium. The gametophyte phase produces gametes by mitosis within an antheridium (producing sperm) and/or archegonium (producing eggs).Within the plant kingdom the dominance of phases varies.ametophyte size ranges from three cells (in pollen) to several million (in a lower plant such as moss). Alternation of generations occurs in plants, where the sporophyte phase is succeeded by the gametophyte phase.