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Unformatted text preview: BIO EXAM II ch 29 I) green algae called charophyceans as the closest relatives of land plants A) four key traits, however, that land plants share only with the charophyceans i) Rose-shaped complexes for cellulose synthesis. ii) Peroxisome enzymes iii) Structure of flagellated sperm iv) Formation of a phragmoplast B) In charophyceans, a layer of a durable polymer called sporopollenin prevents exposed zygotes from drying out, these enabled descendantsthe first land plantsto live permanently above the waterline II) Land Plants A) Five key traits appear in nearly all land plants but are absent in the charophyceans: apical meristems; alternation of generations; walled spores produced in sporangia; multicellular gametangia; and multicellular, dependent embryos. B) Land plants can be informally grouped based on the presence or absence of an extensive system of vascular tissue , cells joined into tubes that transport water and nutrients throughout the plant body. Vascular vs. , cells joined into tubes that transport water and nutrients throughout the plant body....
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