Plant Classificatio2 - discussed in Bryophytes ....

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Plant Classification Liverworts Liverworts gained their name from the liver-like lobes that characterize some types of these plants. Other types are more moss-like, growing on damp rocks or soil, and others are "leafy" and live on moist tree surfaces. Liverworts, which have a life cycle similar to that of mosses (but with simpler sporophytes), can also reproduce asexually through small structures called gemmae that are formed on the surface of the liverwort leaf. After these gemmae break free from the adult plant, they can give rise to new gametophytes on their own. Tracheophytes Tracheophytes are distinguished from bryophytes by their highly developed vascular systems, which facilitate the transport of water and nutrients to all parts of the plant. This vascularization adaptation has allowed tracheophytes to become more fully terrestrial than bryophytes, which are still dependent upon moist environments for many reproductive and nutritive functions, as
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Unformatted text preview: discussed in Bryophytes . Tracheophytes can be broken down into three classes: ferns, gymnosperms, and angiosperms. Ferns are the least evolved of the tracheophytes; they have vascular systems, and specialized leaf and root structures, but are still dependent on moist environments for reproduction. Gymnosperms (coniferous plants) and angiosperms (flowering plants), known together as the seed plants, have evolved reproductive processes that are independent of water. In addition, tracheophyte seed plants all produce embryos that are encased in tough coats. These seed coats prevent desiccation in a terrestrial environment and protect the seed until conditions are favorable for growth. Angiosperms can be further classified as monocots and dicots, depending on their embryonic development and other factors....
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This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.

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