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Published byConstance Sherman Modified over 9 years ago
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8.2 Plants Without Seeds
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Nonvascular Plants Do not grow tall Do not have roots, stems or leaves Live in moist areas Absorb water directly from environment Sperm cells swim to egg cells Only 3 major groups Mosses Liverworts Hornworts
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Mosses Grow in damp, shady spots Rhizoids – thin, rootlike structures that anchor the moss and absorb water and nutrients from the soil
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Liverworts Often grow on rocks by a stream Leaf-like structures resemble a human liver
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Hornworts Usually live in moist soil, mixed in with grass Sporophytes look like horns
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Seedless Vascular Plants First types of vascular plants Do not have seeds Reproduce with spores Can grow tall Must grow in moist surroundings Must be enough water for fertilization to occur 3 Main types Ferns Horsetails Club Mosses
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Ferns Fronds – fern leaves Spores are spread by wind and water Will grow into plant if it lands in moist, shaded soil
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Horsetails Jointed stems Stems contain silica, a gritty substance also in sand Prefer to grow in sandy soil Considered a nuisance weed, because it easily regrows after being pulled out
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Club Mosses NOT mosses Looks like a small pine tree Ground pine Typically grow near streams
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