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Plant Life Cycle - Plant Lif CycleLab Lecture Common...

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Plant Lif Cycle-Lab Lecture 23/03/2009 08:07:00 Charaphytes share the most recent common ancestor with land pants Common challenges living on land: Desiccation Competition for sunlight Obtain water structural support Cross Fertilization and dispersal of zygote Land plants : mosses, ferns, Gymnosperm, Angiosperm Apical meristem Wall spores with spropollenin Alternation of generation Multicellular dependent embryo Multicellular gametangia Ferns, Gymnosperm, Angiosperm (Vascular plants) Vascular tissue Sporophyte dominant Multiple sporangia on sporophyte GymnoSperm, Angiosperm (Seed Plants) Ovule/seed Pollen grain Reduce gametophyte Angiosperm Fruit Flower Double Fertilization
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Alternation of Generation Two different kind of changes, haploid, diploid Spore(n)-->Gametophyte (n)-->Mitosis-->Gamete+Gamete-->Fertilization--
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