PLANTS By Erin Martin, Celine Li and Adrienne Favorito.

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Presentation transcript:

PLANTS By Erin Martin, Celine Li and Adrienne Favorito

Alternation of Generations

multicellular diploid (sporophyte) multicellular haploid (gametophyte)

Bryophytes Dominant gametophyte generation

Double fertilization One sperm fertilizes the egg  zygote One sperm fertilizes 2 polar nuclei  endosperm which provides the zygote with nutrients

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

Growth Primary- length of the plant, (apical meristem) Secondary- width of the plant (lateral meristem) - Vascular Cambium: gives rise to secondary xylem and phloem

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

Leaf Structure and Function Waxy cuticle Guard cells/ stoma - gas exchange -CAM Cork Cambium Palisade mesophyll Spongy mesophyll