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Unformatted text preview: Plant Intro & Structure GSU - Principles of Biology II Leege What is a Plant??? How are they different from animals? List characteristics unique to plants (what you think) autotrophs cell walls, chloroplasts, chlorophyll a and b self pollinating completely different structure than animals Plant Intro: Key Characteristics Multicellular Photoautotrophic Cellulose cell wall Chlorophyll a and b (All shared w/ green algae) Key Characteristics Apical meristem grow only from tips Alternation of generations some haploid, some diploid Walled spores (sporopollenin) Multicellular gametangia archaegonia makes eggs, antheridia makes sperm Multicellular dependent embryo embryo retained in whatever its made in Cuticle waxy layer; keeps moisture in and helps as protection Embryo protected against desiccation - desiccation = drying out; #1 characteristic separating plants form everything else Alternation of Generations Figure 29.5a Alternation of generations: life cycle of all plants Multicellular haploid generation = gametophyte generation Multicellular diploid generation = sporophyte generation How did alternation of generations arise?How did alternation of generations arise?...
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