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Published byMitchell Atkins Modified over 9 years ago
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PLANTS By Erin Martin, Celine Li and Adrienne Favorito
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Alternation of Generations
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multicellular diploid (sporophyte) multicellular haploid (gametophyte)
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Bryophytes Dominant gametophyte generation
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Double fertilization One sperm fertilizes the egg zygote One sperm fertilizes 2 polar nuclei endosperm which provides the zygote with nutrients
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Types of cells Parenchyma- play a role in storage, secretion and photosynthesis in cells Sclerenchyma- protect seeds and support the plants Collenchyma- provide flexible and mechanical support; found in stems and leaves
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Growth Primary- length of the plant, (apical meristem) Secondary- width of the plant (lateral meristem) - Vascular Cambium: gives rise to secondary xylem and phloem
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Parts of the seed Endosperm/ cotyledon- nutrients for seed before it can undergo photosynthesis Plumule leaves hypocotyl stem Radicle root Seedcoat protects embryo from environment
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Leaf Structure and Function Waxy cuticle Guard cells/ stoma - gas exchange -CAM Cork Cambium Palisade mesophyll Spongy mesophyll
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