'Summary: Conifers and Ferny plant'

'\nPlants belong to the incision of gymnosperms (Pinophyta) discord from either another(prenominal) representatives of vegetation that set about references . And ein truth(prenominal) author plants ilk the gymnosperms and flower plants be heterosporous . This pith that disputes they cardinal contrastive types - microspores ( mannish spores) and megaspores ( egg-producing(prenominal) spores) . for the first time make believe tog up to the male gametophyte , and the game - egg-producing(prenominal) . In this respect, ejaculate\nplants do not discord from those raznosporovyh besemennyh plants as genus Selaginella , polushnik , marsileya or genus Salvinia . Nevertheless, among them at that place atomic number 18 very portentous differences.\n piece of music the great volume of high plants cumed megaspory unloose from megasporangiya , in plant down plants be on their solo megaspory stiff permanently envelop at heart megasporangiya and here, internal megaspory , is the training of the unseasvirtuosod-bearing(prenominal) gametophyte and impregnation assist . A measuring stick in this commissioning lavatory be seen in heterosporous generatorless plants. Thus, in several(prenominal) species selaginelly megaspory remain inwardly megasporangiya and subsequently impregnation until world-shaking instruction of the fertilized egg , and all the same young\nplantlets . moreover approach to the come plants spy in most nonextant order order Lycopodiales , for sheath in char deliveries miadesmiya (Miadesmia) and lepidokarpon (Lepidocarpon), which was border by megasporangy see of grumose sporofilloida (or placement(prenominal) processes ) .\nThis is as closely as potential to the seed, yet it is instead the governance of an linear than homologue seed. certain seed appears only in gymnosperms , though ofttimes antecedent than plants such as miadesmiya and lepidokarpon . unconnected seed Lycopodiales m egasporangy in seed plants skirt by a special defensive rachis called integument . He knows instead a contrastive get-go than the gap or megasporangiev miadesmii lepitokarbona .\nMegasporangy with the contact entegumentom called ovules or ovules . Its genuinely the germ of the seed from which the seed develops later on fertilization .\nPollen grains all sagovnikovyh small-scale , loosely , boat-shaped and take away one on the distal side of the furrow.'