Angios - Ovule Seed Fruit Mature ovary(and accessory tissues containing seeds Sepals Pedicel Style/stigma Ovary wall or pericarp Seeds Simple

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Angiosperms
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Big questions Where/how do seeds develop in the angiosperms? What is a fruit and what forms do fruits take?
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Vascular plants with seeds Gymnosperms Seeds naked, no flowers/fruits Angiosperms Seeds contained in fruit
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Seed plants Retain female gametophyte Sporophyte can directly support Embryo dispersed w/ food reserves
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Pistils Fig 23.10
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See Fig 8.5
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Superior ovary Inferior ovary
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Corn: imperfect wind pollinated flowers
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Inflorescences
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Composite flower: An inflorescence
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Seed: Mature ovule containing an embryo
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Flower x-section
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Pollen grain Microgametophyte Anther
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Pollination Pollen arrives on stigma Fertilization Sperm fuses with egg
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Megaspore mother cell Megaspore (4 made, 1 survives) Megagametophyte (7 cells, 8 nuclei) Ovule
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Megagametophyte Polar nuclei Egg nucleus
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Megagametophyte Sperm nuclei Polar nuclei Egg nucleus Double fertilization
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Megagametophyte Sperm nuclei Polar nuclei Egg nucleus Double fertilization Endosperm (triploid) Food reserves for embryo Zygote (diploid) Embryo
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Embryo Endosperm
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In many species, endosperm is absorbed very early in development Food reserves
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Unformatted text preview: Ovule Seed Fruit: Mature ovary (and accessory tissues) containing seeds Sepals Pedicel Style/stigma Ovary wall or pericarp Seeds Simple fruits (1 ovary) Fleshy: Drupe, berry, pepo, hesperidium, pome Dry: Nut, achene, samara, caryopsis, follicle, legume, silique, sillicle, capsule Complex fruits (>1 ovary, fleshy or dry) Aggregate: Single flower, multiple ovaries Multiple: Multiple flowers Simple fruits (1 ovary) Fleshy: Drupe, berry, pepo, hesperidium, pome Dry: Nut, achene, samara, caryopsis, follicle, legume, silique, sillicle, capsule Complex fruits (>1 ovary, fleshy or dry) Aggregate: Single flower, multiple ovaries Multiple: Multiple flowers Drupe: inner layer of ovary wall becomes stony Pit is not a seed Olive Almond Berry: all layers of ovary wall are fleshy Tomato Eggplant Grape Pepo: Fleshy, with relatively thick rind Squash/pumpkin family Hesperidium: Fleshy, with leathery rind, oil glands Citrus family Pome: Fleshy, mostly floral tube or receptacle Apple & relatives...
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This note was uploaded on 03/07/2011 for the course BIO 130 taught by Professor Dr.bell during the Spring '11 term at Wisc Stevens Point.

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Angios - Ovule Seed Fruit Mature ovary(and accessory tissues containing seeds Sepals Pedicel Style/stigma Ovary wall or pericarp Seeds Simple

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