NONVASCULAR PLANTS AND NONSEED VASCULAR PLANTS

NONVASCULAR PLANTS AND NONSEED VASCULAR PLANTS - an...

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NONVASCULAR PLANTS AND NONSEED VASCULAR PLANTS The plant kingdom contains multicellular phototrophs that usually live on land. The earliest plant fossils are from terrestrial deposits, although some plants have since returned to the water. All plant cells have a cell wall containing the carbohydrate cellulose , and often have plastids in their cytoplasm. The plant life cycle has an alternation between haploid ( gametophyte ) and diploid ( sporophyte ) generations. There are more than 300,000 living species of plants known, as well as
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Unformatted text preview: an extensive fossil record. Plants divide into two groups: plants lacking lignin-impregnated conducting cells (the nonvascular plants) and those containing lignin-impregnated conducting cells (the vascular plants). Living groups of nonvascular plants include the bryophytes : liverworts, hornworts, and mosses. Vascular plants are the more common plants like pines, ferns, corn, and oaks. The phylogenetic relationships within the plant kingdom are shown in Figure 1....
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