Gametophytes mature within sporophyte→Megaspores grow into female gametophytes○Microspores grow into male gametophytes○Seed plants are heterosporous→Both tiny gametophytes mature within sporophyte○This is good because the sporophyte can provide protection and nutrients○Spores are not released from sporangia→Reproductive adaptations•Megaspore matures to female gametophyte→Egg produced and fertilized within ovule→All gymnosperms and angiosperms contain seeds→Ovule : derived from a megasporangium on a Sporophyll•Retains microspores while they mature○Microsporangium→Mature male gametophytes○Pollen grains→New step in sex○Pollen grain then grows new pollen tube towards egg in ovule○Pollen grains travel thru air to reach ovule bearing parts = pollination→Pollen•Fertilization occurs within ovule→No flagella in the sperm of conifers and angiosperms•Includes embryo, food supply, seed coat○Develops from fertilized ovule→Seed•
