Lesson 6 (2-8-16) - Lesson 6 Unique Features of Reproduction of Angiosperms Structure and Evolution of Flowers Flowers involved in angiosperms

Lesson 6 (2-8-16) - Lesson 6 Unique Features of...

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Lesson 6: Unique Features of Reproduction of Angiosperms Structure and Evolution of Flowers Flowers involved in angiosperms Morphology o Complete flower o Incomplete flower Trends in Floral Specialization/Symmetry Fusion Reduction Radial symmetry Bilateral symmetry Gamete Production Alternation of generations o Diploid and haploid generations o Pollen grains Microgametophytes o Embryo sac Megagametophytes Gametophytes o Embryo sac 8 nuclei 7 cells o Pollen grain Pollination Self-pollination o Ecologically advantageous Outcrossing o Separation of male and female structures o Monoecious o Dioecious o Dichogamous o Self-incompatibility Pollinators and angiosperms co-evolution o Bees o Insects other than bees o Birds o Small mammals
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o Wind Angiosperms and double fertilization o Fertilization of egg o Formation of endosperm (3n) Embryo development Endosperm and embryo 3 dimensional body plan Suspensor Food reserves and embryogenesis Development of: o Food supply o Seed coat o Fruit surrounding seed Fruits are adapted for dispersal o Fleshy o Dry o Aggregate o Multiple Dispersal aids colonization
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