key concept 37.1 Most Angiosperms Reproduce Sexually
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How does the flower function as a structure for sexual reproduction?
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Flowering plants have microscopic gametophytes
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A pollen tube delivers sperm cells to the embryo sac
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Many flowering plants control pollination or pollen tube growth to prevent inbreeding
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Angiosperms perform double fertilization
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Embryos develop within seeds contained in fruits
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Seed development is under hormonal control
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key concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
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Flowering occurs at specific places and specific times
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A cascade of gene expression leads to flowering
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Photoperiodic cues can initiate flowering
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Plants vary in their responses to photoperiodic cues
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Night length is a key photoperiodic cue that determines flowering
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The flowering stimulus originates in a leaf
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Florigen is a small protein
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Flowering can be induced by temperature or gibberellin
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Some plants do not require an environmental cue to flower
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key concept 37.3 Angiosperms Can Reproduce Asexually
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Plants reproduce asexually by several methods
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Vegetative reproduction has a disadvantage
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Vegetative reproduction is important in agriculture
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In apomixis, flowers are used in asexual reproduction
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Apply What Youâve Learned
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