Maloof_18AB_Seed

Maloof_18AB_Seed - Lecture 18, Feb 5: Seed Plants Seeds...

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Unformatted text preview: Lecture 18, Feb 5: Seed Plants Seeds what are seeds? importance development Pollen what is pollen? development Growth apical girth Lecture 18, Feb 5: Seed Plants Seeds what are seeds? importance development Pollen what is pollen? development Growth apical girth Figure 29.8 The Life Cycle of a Pine Tree Pine Life Cycle: No antheridia!! 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 The pine life cycle illustrates common features among seed plants chloroplast DNA inversion megaphylls,...
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Maloof_18AB_Seed - Lecture 18, Feb 5: Seed Plants Seeds...

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