CHAPTER 8 SECTION 2 PLANTS WITHOUT SEEDS. NONVASCULAR PLANTS Three major groups of nonvascular...

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Transcript of CHAPTER 8 SECTION 2 PLANTS WITHOUT SEEDS. NONVASCULAR PLANTS Three major groups of nonvascular...

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CHAPTER 8 SECTION 2 PLANTS WITHOUT SEEDS Slide 2 NONVASCULAR PLANTS Three major groups of nonvascular plants Three major groups of nonvascular plants Mosses Liverworts Hornworts Slide 3 CHARACTERISTICS OF NONVASCULAR PLANTS Low-growing Live in moist environments Absorb water and other nutrients directly Watery surroundings enable sperm cells to swim to egg cells Slide 4 MOSSES 10,000 species gametophyte generation Green, fuzzy moss is the gametophyte generation of the plant Rhizods: Rhizods: thin, rootlike structures that anchor the moss and absorb water and nutrients from the soil sporophyte generation The sporophyte generation grows out of the gametophyte The sporophyte consists of a slender stalk with a capsule at the end The capsule contains spores Slide 5 A MOSS PLANT Slide 6 LIVERWORTS 8,000 species a thick crust on moist rocks Often found growing as a thick crust on moist rocks or soil along the sides of a stream Slide 7 HORNWORTS Fewer than 100 species Live in moist soil Live in moist soil, often mixed in with grass plants Slide 8 SEEDLESS VASCULAR PLANTS Characteristics Characteristics vascular tissue Ferns, club mosses and horsetails have true vascular tissue Do not produce seeds Do not produce seeds, these plants reproduce by releasing spores effectively Can grow tall because vascular tissues effectively transport materials strength and stability Provide strength and stability moist Grow in moist environments There must be enough water for the sperm to swim to the eggs Slide 9 FERNS Stems of most ferns grow underground Fronds Fronds Fern leaves, divided into many smaller parts that look like small leaves cuticle The cuticle is found on the upper surface of each frond, helps retain plant water spore cases Tiny spore cases are found on the underside of the fronds Slide 10 Slide 11 HORSETAILS Seedless, vascular plant Stems are jointed Long, coarse, needle-like branches Resemble a horses tail Silica Silica Stem contains a gritty substance also found in sand Slide 12 CLUB MOSSES Seedless, vascular plant Not to be confused with moss Grow in moist woodlands and near streams