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Flowers Laboratory

Flowers Laboratory. Flower Structure and Interactions with Pollinators. Sporophyte. Flower. Pollen grains. Gametophytes. embryo sac. Flowering Plant Reproduction. Flowers are modified leaves, specialized for reproduction. Flowers form on the diploid Sporophyte

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Flowers Laboratory

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  1. Flowers Laboratory Flower Structure and Interactionswith Pollinators

  2. Sporophyte Flower Pollengrains Gametophytes embryosac Flowering Plant Reproduction • Flowers are modified leaves, specialized for reproduction. • Flowers form on the diploid Sporophyte • Flower parts undergo meiosis to produce haploid Gametophytes • pollen grain • embryo sac

  3. Stamen Pistil A Complete Flower Has Both Male and Female Parts Anther Filament Stigma Petal Style Sepal All Petals=Corolla Ovary All Sepals=Calyx

  4. Plant Reproduction

  5. MatureSporophyte Flowering Plant Life Cycle Megaspore(female) meiosis Microspore(male) SpermCells mitosis,differentiation,growth mitosis,differentiation mitosis,differentiation MaleGametophyte(Pollen) EggCell FemaleGametophyte(Embryo Sac) fusionto formzygotein ovary Diploid2n Haploid1n

  6. Mature PollenGrain Pollination andFertilization in a Flower Sperm Cells Tube Cell Nucleus 1. pollen grainsland on stigma 3a Fusion of 2ndsperm + twopolar nuclei 2. pollen tubes growdown style to ovary Stigma 3. doublefertilization Style Sperm 3b Fusion ofsperm + egg Ovule Polar nuclei Ovary Egg

  7. Development of Fruit and SeedsFrom Flower Parts Endosperm Triploid Endosperm Cell FreshFruit Ovary SeedCoat Integument Zygote Embryo • Seed = fertilized ovule = embryo + endosperm + seed coat • Fruit = ovary wall, mechanism for seed dispersal

  8. Comparing Monocot and Dicot Plants

  9. Flower Symmetry Radial Symmetry(Regular) Bilateral Symmetry(Irregular)

  10. Superior Ovary InferiorOvary Ovary Position

  11. Coevolution of Plant and Pollinator

  12. Wind Pollination

  13. Pollination by Beetles

  14. Pollination by Ants

  15. Pollination by Carrion Flies

  16. Pollination by Mammals

  17. Pollination by Wasps

  18. Pollination by Bees

  19. Ultraviolet Patterns Guide Bees to Nectar HumanVision BeeVision

  20. Impersonating a Pollinator

  21. Pollination by Moths

  22. Pollination by Hummingbirds

  23. Pollination by Butterflies

  24. Composite Flowers

  25. CLEAN UP! • Leave plant specimens in orderly arrays • Discard dissected flower parts in the trash • Return any microscopes to their cabinets Thank you!

  26. Worksheet • Turn in pages 151-153 from lab manual • Record your answer and reasoning for any 10 specimens, making sure to write the answer on the line that matches the specimen number • Be sure your instructor checks your completed worksheet before you leave the lab

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