Lecture+20+W+20112

Lecture+20+W+20112 - Seed plant synapomorphies - Seeds -...

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Unformatted text preview: Seed plant synapomorphies - Seeds - Pollen - The Pine life cycle Seed Plants groups Gymnosperms Angiosperms The Gymnosperms The Angiosperms Synapomorphies of the group The Angiosperm Flower Monocots vs Eudicots Lecture 20: Seed Plants Sporophyte and Gametophyte relationship DIPLOID (2 n ) Sporophyte generation Meiosis Meiosis Megasporangium Megasporocyte Functional megaspore Pollen grain Pollen grain Microspores Male gametophyte (germinating pollen grain) Fertilization Egg Sperm Archegonium Female gametophyte Developing embryos Zygote Section through scale Scale of strobilus Strobili Immature cone Sporophyte (about 10100 m) Scale of cone Wing Seed Winged seed Female gametophyte Embryo Seed coat Mature cone HAPLOID ( n ) Gametophyte generation Ovule Pine Life Cycle: No antheridia!! Two Clicker Questions A B C D E Which group has sporophyte completely dependent on gametophyte? A B C D E Which group has all free-living (independent of sporophyte) gametophytes? no yes gam. no yes gam. no yes gam. yes yes spor. yes yes spor. yes yes spor. yes yes spor. yes no spor. yes no spor. Life Cycle Trends Seed plant synapomorphies - Seeds - Pollen - The Pine life cycle Seed Plants groups Gymnosperms Angiosperms The Gymnosperms The Angiosperms Synapomorphies of the group The Angiosperm Flower Monocots vs Eudicots Lecture 20: Seed Plants Seed Plant Life Cycle...
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Lecture+20+W+20112 - Seed plant synapomorphies - Seeds -...

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