The document summarizes the characteristics and life cycles of nonvascular and seedless vascular plants. It describes two divisions of plants - nonvascular plants like moss that lack roots, stems, and leaves, and vascular plants that have transport tissues. Moss and liverworts are examples of nonvascular plants that reproduce via alternation of generations between sporophyte and gametophyte stages. Ferns are an example of seedless vascular plants that have true stems, roots, and leaves called fronds. Their life cycle also involves alternation between sporophyte and gametophyte stages. Ferns and other seedless plants were important in forming peat bogs and peat, which was used as fuel.