Reading: Seedless Plants - Biology LibreTexts.
Figure 1: Seedless plants like these horsetails (Equisetum sp.) thrive in damp, shaded environments under the tree canopy where dryness is a rare occurrence. (credit: Jerry Kirkhart) Bryophytes. Bryophytes, an informal grouping of the nonvascular plants, are the closest extant relative of early terrestrial plants. The first bryophytes most probably appeared in the Ordovician period, about 490.
Although seedless, these plants flourished in the warm, moist climate, sometimes growing to heights of over a hundred feet. Today only a few ground plants remain, for the spore-producing vascular plant has been replaced by coniferous and deciduous seed plants. Still present today are the spike mosses, ferns, horsetails, club mosses, and quillworts, tiny reminders of the lush vegetation that.
List 15.Seedless plants. STUDY. Flashcards. Learn. Write. Spell. Test. PLAY. Match. Gravity. Created by. rrn5298. Terms in this set (9) Seedless plants. SEEDLESS PLANTS. Ferns, horsetails, mosses, and liverworts do not produce flowers or grow from seeds. The life cycles of these plants have two distinct stages - one in which SPORES are produced, and one in which sex cells (sperm and eggs) are.
So the importance is that seedless plants makes coal and peat over time from ancient seedless plants. Also non-vascular seedless plants help build new soil. And lastly seedless vascular plants can.
An extreme case is the dwarfing of alpine plants (plants growing in high altitude, above 3,600 metres in tropics) by intense light to which they are subjected to. The light in the alpine region is very rich in violet and ultra-violet radiations and it seems that in general, light of smaller wave-lengths as also light waves longer than far red, have specific inhibitory effect on vegetative growth.
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Seedless vascular plants, such as ferns, are sporophyte dominant. This means that the longest lived,, most dominant structure is the diploid sporophyte. We will look at a fern’s life cycle to demonstrate how seedless vascular plants reproduce. A mature sporophyte has fronds. On the underside of the leaves are small clusters of sporangia. These clusters are called sori. The sporangia produce.