Here, the dominant sporophyte produces spores through meiosis. Alternation of Generation in Pteridophytes. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct. Classification 6. Pteridophyta (Pteridophytes): A division of the plant kingdom, comprising the vascular cryptogams. Indian Work. The gametophyte is dominant in bryophytes whereas the sporophyte is dominant in pteridophytes. The gametophyte generation forms gametes by mitosis. The spores are produced by the sporangia in the spore mother cells. Key Differences Between Bryophytes and Pteridophytes. In the life cycle of Pteridophytes, two distinct individuals can be observed i.e., there is a typical heteromorphic alternation of sporophytic and gametophytic generations. In bryophytes, where the two generations are morphologically different, the type of alternation of generations is known as heteromorphic. Similarities between Pteridophytes and Gymnosperms: 1. What are Pteridophytes? Saved from easybiologyclass.com. Start studying Plant life-cycle and alternation of Generation. Plants exhibit haplodiplontic life cycle wherein the gametes (sex cells) are not a direct product of meiosis. Sporophyte is the predominant plant body and is differentiated into root, stem and leaves. Haploid spore is the beginning point of the gametophytic stage. Ø They show heteromorphic alternation of generation with prominent Sporophytic and Gametophytic phases. Characteristics of Pteridophytes, Morphology of Pteridophytes, Reproduction of Pteridophytes, Homosporous and Heterosporous Pteridophytes, Megaspore and Microspores, Gametophytes of Pteridophytes, Fertilization, Zygote and Embryo of Pteridophytes, Life Cycle and Alternation of Generation. The life cycles of all the plant groups from Bryophytes onwards exhibit an alternation of generations. All pteridophytes have a true alternation of generations, in which a dominant sporophyte generation produces spores through meiosis , and a free-living gametophyte generation forms gametes (egg and sperm) by mitosis . Learn exactly what happened in this chapter, scene, or section of The Life Cycle of Plants and what it means. Sexuality 9. The sporophytic stage is dominant. easybiologyclass. Habit and Habitat of Pteridophytes Origin of Pteridophytes 3. The gametophyte is dominant in bryophytes whereas the sporophyte is dominant in pteridophytes. This is called alternation of a generation where two types of cells haploid cells and diploid cells are formed one after the other.