FlowersIII

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Flowers-III
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Animal pollinators
Honey bee Beetle
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Butterfly and humming bird
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Moth and Bee
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Possum pollination
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Anemophilous flowers common ragweed
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Giant ragweed
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Acer spp Box elder and red maple
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Elm and pecan
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Quercus spp black jack oak and pin oak
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Grass inflorescence
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Rye and sorghum flowers
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Male and female inflorescences in corn
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Airborne pollen sample
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(No Transcript)
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Pollen grain lands on stigma
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Pollen grain germinates
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Pollen tube growth and production of two sperm
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Double Fertilization

• Sperm Egg ? Zygote (2N)
• Sperm 2 polar nuclei ? Primary endosperm
  nucleus (3N)

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Zygote develops into the embryo
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Embryo development
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Embryo development
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Stamen Evolution
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Carpel Evolution