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Chapter 20 (mosses (development (begins when a spore germinates and sends…
Chapter 20
mosses
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water transport
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rhizoids = small, multicellular trichome-like structures that penetrate the surface of the substrate
development
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protonema = resembles filamentous green alga, has numerous small chloroplasts in each cell
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sporophyte generation
zygote undergoes transverse division, develops the foot = absorbs sugars, minerals, water
grow into a capsule = simple apical sporangium.. meiosis, haploid
between sporangium and foot is the seta, and all moss sporophytes have it
operculum = caplike lid, separates from rest of sporangium
cell breakage results in peristome teeth, they respond to humidity bu bending inward and outward depending on if the air is dry or humid
liverworts
similar to mosses, small and have an alternation of heteromorphic generations #
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hornworts
group of small, inconspicuous thalloid plants that grow on moist soil, hidden by grasses and other herbs
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resemble thalloid liverworts #